157979394 has 12 divisors (see below), whose sum is σ = 342288726. Its totient is φ = 52659792.

The previous prime is 157979389. The next prime is 157979407. The reversal of 157979394 is 493979751.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 156575169 + 1404225 = 12513^2 + 1185^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157979394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4388299 + ... + 4388334.

Almost surely, 2^157979394 is an apocalyptic number.

157979394 is an abundant number, since it is smaller than the sum of its proper divisors (184309332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157979394 is a wasteful number, since it uses less digits than its factorization.

157979394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8776641 (or 8776638 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 157979394 is about 12568.9854005803. The cubic root of 157979394 is about 540.5885147574.

The spelling of 157979394 in words is "one hundred fifty-seven million, nine hundred seventy-nine thousand, three hundred ninety-four".