157790929 has 4 divisors (see below), whose sum is σ = 157818276. Its totient is φ = 157763584.

The previous prime is 157790921. The next prime is 157790933. The reversal of 157790929 is 929097751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 929097751 = 8291 ⋅112061.

It can be written as a sum of positive squares in 2 ways, for example, as 48274704 + 109516225 = 6948^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 157790929 - 2³ = 157790921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157790921) 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, 1264 + ... + 17809.

It is an arithmetic number, because the mean of its divisors is an integer number (39454569).

Almost surely, 2^157790929 is an apocalyptic number.

It is an amenable number.

157790929 is a deficient number, since it is larger than the sum of its proper divisors (27347).

157790929 is an equidigital number, since it uses as much as digits as its factorization.

157790929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27346.

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 157790929 is about 12561.4859391714. The cubic root of 157790929 is about 540.3734602222.

The spelling of 157790929 in words is "one hundred fifty-seven million, seven hundred ninety thousand, nine hundred twenty-nine".