156903939 has 16 divisors (see below), whose sum is σ = 238734240. Its totient is φ = 101774880.

The previous prime is 156903899. The next prime is 156903941. The reversal of 156903939 is 939309651.

It is not a de Polignac number, because 156903939 - 2⁷ = 156903811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156903894 and 156903903.

It is not an unprimeable number, because it can be changed into a prime (156903979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77532 + ... + 79529.

It is an arithmetic number, because the mean of its divisors is an integer number (14920890).

Almost surely, 2^156903939 is an apocalyptic number.

156903939 is a deficient number, since it is larger than the sum of its proper divisors (81830301).

156903939 is a wasteful number, since it uses less digits than its factorization.

156903939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157107 (or 157101 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 156903939 is about 12526.1302484047. The cubic root of 156903939 is about 539.3590234165.

The spelling of 156903939 in words is "one hundred fifty-six million, nine hundred three thousand, nine hundred thirty-nine".