157901977 has 16 divisors (see below), whose sum is σ = 168764992. Its totient is φ = 147510720.

The previous prime is 157901971. The next prime is 157901981. The reversal of 157901977 is 779109751.

It is a cyclic number.

It is not a de Polignac number, because 157901977 - 2²⁷ = 23684249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157901971) 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, 96238 + ... + 97864.

It is an arithmetic number, because the mean of its divisors is an integer number (10547812).

Almost surely, 2^157901977 is an apocalyptic number.

It is an amenable number.

157901977 is a deficient number, since it is larger than the sum of its proper divisors (10863015).

157901977 is a wasteful number, since it uses less digits than its factorization.

157901977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 138915, while the sum is 46.

The square root of 157901977 is about 12565.9053394493. The cubic root of 157901977 is about 540.5001961101.

The spelling of 157901977 in words is "one hundred fifty-seven million, nine hundred one thousand, nine hundred seventy-seven".