157020717 has 8 divisors (see below), whose sum is σ = 239269696. Its totient is φ = 89726112.

The previous prime is 157020707. The next prime is 157020733. The reversal of 157020717 is 717020751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157020717 - 2¹¹ = 157018669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157020707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3738568 + ... + 3738609.

It is an arithmetic number, because the mean of its divisors is an integer number (29908712).

Almost surely, 2^157020717 is an apocalyptic number.

It is an amenable number.

157020717 is a deficient number, since it is larger than the sum of its proper divisors (82248979).

157020717 is an equidigital number, since it uses as much as digits as its factorization.

157020717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477187.

The product of its (nonzero) digits is 3430, while the sum is 30.

The square root of 157020717 is about 12530.7907571709. The cubic root of 157020717 is about 539.4927987889.

The spelling of 157020717 in words is "one hundred fifty-seven million, twenty thousand, seven hundred seventeen".