157797974 has 4 divisors (see below), whose sum is σ = 236696964. Its totient is φ = 78898986.

The previous prime is 157797953. The next prime is 157797977. The reversal of 157797974 is 479797751.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157797977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39449492 + ... + 39449495.

It is an arithmetic number, because the mean of its divisors is an integer number (59174241).

Almost surely, 2^157797974 is an apocalyptic number.

157797974 is a deficient number, since it is larger than the sum of its proper divisors (78898990).

157797974 is an equidigital number, since it uses as much as digits as its factorization.

157797974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78898989.

The product of its digits is 3889620, while the sum is 56.

The square root of 157797974 is about 12561.7663566873. The cubic root of 157797974 is about 540.3815022442.

It can be divided in two parts, 157797 and 974, that multiplied together give a triangular number (153694278 = T₁₇₅₃₂).

The spelling of 157797974 in words is "one hundred fifty-seven million, seven hundred ninety-seven thousand, nine hundred seventy-four".