154009397 has 4 divisors (see below), whose sum is σ = 154245900. Its totient is φ = 153772896.

The previous prime is 154009369. The next prime is 154009417. The reversal of 154009397 is 793900451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793900451 = 21737 ⋅36523.

It can be written as a sum of positive squares in 2 ways, for example, as 29441476 + 124567921 = 5426^2 + 11161^2 .

It is a cyclic number.

It is not a de Polignac number, because 154009397 - 2¹² = 154005301 is a prime.

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 154009397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154009327) 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, 117272 + ... + 118577.

It is an arithmetic number, because the mean of its divisors is an integer number (38561475).

Almost surely, 2^154009397 is an apocalyptic number.

It is an amenable number.

154009397 is a deficient number, since it is larger than the sum of its proper divisors (236503).

154009397 is an equidigital number, since it uses as much as digits as its factorization.

154009397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236502.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 154009397 is about 12410.0522561349. The cubic root of 154009397 is about 536.0217432425.

The spelling of 154009397 in words is "one hundred fifty-four million, nine thousand, three hundred ninety-seven".