154972099 has 4 divisors (see below), whose sum is σ = 155035264. Its totient is φ = 154908936.

The previous prime is 154972079. The next prime is 154972117. The reversal of 154972099 is 990279451.

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: 990279451 = 7 ⋅141468493.

It is a cyclic number.

It is not a de Polignac number, because 154972099 - 2⁵ = 154972067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154972079) 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, 27747 + ... + 32860.

It is an arithmetic number, because the mean of its divisors is an integer number (38758816).

Almost surely, 2^154972099 is an apocalyptic number.

154972099 is a deficient number, since it is larger than the sum of its proper divisors (63165).

154972099 is an equidigital number, since it uses as much as digits as its factorization.

154972099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63164.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 154972099 is about 12448.7790164337. The cubic root of 154972099 is about 537.1363022930.

The spelling of 154972099 in words is "one hundred fifty-four million, nine hundred seventy-two thousand, ninety-nine".