157823939 has 16 divisors (see below), whose sum is σ = 194826240. Its totient is φ = 124498080.

The previous prime is 157823923. The next prime is 157823951. The reversal of 157823939 is 939328751.

It is not a de Polignac number, because 157823939 - 2⁴ = 157823923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157823893 and 157823902.

It is not an unprimeable number, because it can be changed into a prime (157823639) 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, 30254 + ... + 35084.

It is an arithmetic number, because the mean of its divisors is an integer number (12176640).

Almost surely, 2^157823939 is an apocalyptic number.

157823939 is a deficient number, since it is larger than the sum of its proper divisors (37002301).

157823939 is a wasteful number, since it uses less digits than its factorization.

157823939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5210.

The product of its digits is 408240, while the sum is 47.

The square root of 157823939 is about 12562.7998073678. The cubic root of 157823939 is about 540.4111397946.

The spelling of 157823939 in words is "one hundred fifty-seven million, eight hundred twenty-three thousand, nine hundred thirty-nine".