157117874 has 4 divisors (see below), whose sum is σ = 235676814. Its totient is φ = 78558936.

The previous prime is 157117847. The next prime is 157117879. The reversal of 157117874 is 478711751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478711751 = 7 ⋅68387393.

It can be written as a sum of positive squares in only one way, i.e., 82174225 + 74943649 = 9065^2 + 8657^2 .

It is not an unprimeable number, because it can be changed into a prime (157117879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39279467 + ... + 39279470.

Almost surely, 2^157117874 is an apocalyptic number.

157117874 is a deficient number, since it is larger than the sum of its proper divisors (78558940).

157117874 is an equidigital number, since it uses as much as digits as its factorization.

157117874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78558939.

The product of its digits is 54880, while the sum is 41.

The square root of 157117874 is about 12534.6668882743. Note that the first 3 decimals coincide. The cubic root of 157117874 is about 539.6040467308.

The spelling of 157117874 in words is "one hundred fifty-seven million, one hundred seventeen thousand, eight hundred seventy-four".