154878913 has 16 divisors (see below), whose sum is σ = 180633600. Its totient is φ = 130059216.

The previous prime is 154878901. The next prime is 154878961. The reversal of 154878913 is 319878451.

It is a happy number.

It is not a de Polignac number, because 154878913 - 2⁹ = 154878401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154878013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72738 + ... + 74836.

It is an arithmetic number, because the mean of its divisors is an integer number (11289600).

Almost surely, 2^154878913 is an apocalyptic number.

It is an amenable number.

154878913 is a deficient number, since it is larger than the sum of its proper divisors (25754687).

154878913 is a wasteful number, since it uses less digits than its factorization.

154878913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 241920, while the sum is 46.

The square root of 154878913 is about 12445.0356769276. The cubic root of 154878913 is about 537.0286192118.

The spelling of 154878913 in words is "one hundred fifty-four million, eight hundred seventy-eight thousand, nine hundred thirteen".