154985913 has 16 divisors (see below), whose sum is σ = 232518400. Its totient is φ = 102014640.

The previous prime is 154985911. The next prime is 154985951. The reversal of 154985913 is 319589451.

154985913 is a `hidden beast` number, since 1 + 54 + 9 + 8 + 591 + 3 = 666.

It is not a de Polignac number, because 154985913 - 2¹ = 154985911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154985911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34198 + ... + 38463.

It is an arithmetic number, because the mean of its divisors is an integer number (14532400).

Almost surely, 2^154985913 is an apocalyptic number.

It is an amenable number.

154985913 is a deficient number, since it is larger than the sum of its proper divisors (77532487).

154985913 is an equidigital number, since it uses as much as digits as its factorization.

154985913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72749 (or 72743 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 154985913 is about 12449.3338375995. Note that the first 3 decimals coincide. The cubic root of 154985913 is about 537.1522616828.

The spelling of 154985913 in words is "one hundred fifty-four million, nine hundred eighty-five thousand, nine hundred thirteen".