316989561 has 8 divisors (see below), whose sum is σ = 483031744. Its totient is φ = 181136880.

The previous prime is 316989553. The next prime is 316989571. The reversal of 316989561 is 165989613.

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

It is not a de Polignac number, because 316989561 - 2³ = 316989553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 316989561.

It is not an unprimeable number, because it can be changed into a prime (316989551) 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, 7547350 + ... + 7547391.

It is an arithmetic number, because the mean of its divisors is an integer number (60378968).

Almost surely, 2^316989561 is an apocalyptic number.

It is an amenable number.

316989561 is a deficient number, since it is larger than the sum of its proper divisors (166042183).

316989561 is a wasteful number, since it uses less digits than its factorization.

316989561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15094751.

The product of its digits is 349920, while the sum is 48.

The square root of 316989561 is about 17804.2006560250. The cubic root of 316989561 is about 681.8387095185.

The spelling of 316989561 in words is "three hundred sixteen million, nine hundred eighty-nine thousand, five hundred sixty-one".