316655389 has 4 divisors (see below), whose sum is σ = 317195424. Its totient is φ = 316115356.

The previous prime is 316655363. The next prime is 316655393. The reversal of 316655389 is 983556613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 316655389 - 2⁵ = 316655357 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 (316655399) 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, 269137 + ... + 270310.

It is an arithmetic number, because the mean of its divisors is an integer number (79298856).

Almost surely, 2^316655389 is an apocalyptic number.

It is an amenable number.

316655389 is a deficient number, since it is larger than the sum of its proper divisors (540035).

316655389 is an equidigital number, since it uses as much as digits as its factorization.

316655389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540034.

The product of its digits is 583200, while the sum is 46.

The square root of 316655389 is about 17794.8135421532. The cubic root of 316655389 is about 681.5990260004.

The spelling of 316655389 in words is "three hundred sixteen million, six hundred fifty-five thousand, three hundred eighty-nine".