157401977 has 4 divisors (see below), whose sum is σ = 157434276. Its totient is φ = 157369680.

The previous prime is 157401971. The next prime is 157401989. The reversal of 157401977 is 779104751.

157401977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42719296 + 114682681 = 6536^2 + 10709^2 .

It is a cyclic number.

It is not a de Polignac number, because 157401977 - 2²⁰ = 156353401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157401971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7178 + ... + 19139.

It is an arithmetic number, because the mean of its divisors is an integer number (39358569).

Almost surely, 2^157401977 is an apocalyptic number.

It is an amenable number.

157401977 is a deficient number, since it is larger than the sum of its proper divisors (32299).

157401977 is an equidigital number, since it uses as much as digits as its factorization.

157401977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32298.

The product of its (nonzero) digits is 61740, while the sum is 41.

The square root of 157401977 is about 12545.9944603846. The cubic root of 157401977 is about 539.9290910549.

The spelling of 157401977 in words is "one hundred fifty-seven million, four hundred one thousand, nine hundred seventy-seven".