154229917 has 4 divisors (see below), whose sum is σ = 159548220. Its totient is φ = 148911616.

The previous prime is 154229893. The next prime is 154229939. The reversal of 154229917 is 719922451.

It is a happy number.

154229917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719922451 = 373 ⋅1930087.

It can be written as a sum of positive squares in 2 ways, for example, as 60933636 + 93296281 = 7806^2 + 9659^2 .

It is a cyclic number.

It is not a de Polignac number, because 154229917 - 2²⁷ = 20012189 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154229917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154229017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659108 + ... + 2659165.

It is an arithmetic number, because the mean of its divisors is an integer number (39887055).

Almost surely, 2^154229917 is an apocalyptic number.

It is an amenable number.

154229917 is a deficient number, since it is larger than the sum of its proper divisors (5318303).

154229917 is an equidigital number, since it uses as much as digits as its factorization.

154229917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318302.

The product of its digits is 45360, while the sum is 40.

The square root of 154229917 is about 12418.9338109195. The cubic root of 154229917 is about 536.2774573850.

The spelling of 154229917 in words is "one hundred fifty-four million, two hundred twenty-nine thousand, nine hundred seventeen".