157668934 has 4 divisors (see below), whose sum is σ = 236503404. Its totient is φ = 78834466.

The previous prime is 157668923. The next prime is 157668989. The reversal of 157668934 is 439866751.

157668934 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 is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39417232 + ... + 39417235.

It is an arithmetic number, because the mean of its divisors is an integer number (59125851).

Almost surely, 2^157668934 is an apocalyptic number.

157668934 is a deficient number, since it is larger than the sum of its proper divisors (78834470).

157668934 is an equidigital number, since it uses as much as digits as its factorization.

157668934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78834469.

The product of its digits is 1088640, while the sum is 49.

The square root of 157668934 is about 12556.6290858654. The cubic root of 157668934 is about 540.2341622764.

The spelling of 157668934 in words is "one hundred fifty-seven million, six hundred sixty-eight thousand, nine hundred thirty-four".