316489681 has 4 divisors (see below), whose sum is σ = 323223552. Its totient is φ = 309755812.

The previous prime is 316489643. The next prime is 316489687. The reversal of 316489681 is 186984613.

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, and also an emirpimes, since its reverse is a distinct semiprime: 186984613 = 211 ⋅886183.

It is a cyclic number.

It is not a de Polignac number, because 316489681 - 2¹³ = 316481489 is a prime.

It is a super-2 number, since 2×316489681² = 200331436358963522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316489687) 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, 3366865 + ... + 3366958.

It is an arithmetic number, because the mean of its divisors is an integer number (80805888).

Almost surely, 2^316489681 is an apocalyptic number.

It is an amenable number.

316489681 is a deficient number, since it is larger than the sum of its proper divisors (6733871).

316489681 is an equidigital number, since it uses as much as digits as its factorization.

316489681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733870.

The product of its digits is 248832, while the sum is 46.

The square root of 316489681 is about 17790.1568570938. The cubic root of 316489681 is about 681.4801100612.

The spelling of 316489681 in words is "three hundred sixteen million, four hundred eighty-nine thousand, six hundred eighty-one".