313652981 has 4 divisors (see below), whose sum is σ = 313773600. Its totient is φ = 313532364.

The previous prime is 313652971. The next prime is 313652987. The reversal of 313652981 is 189256313.

It is a happy number.

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 313652981 - 2¹⁰ = 313651957 is a prime.

It is a super-2 number, since 2×313652981² = 196756384980372722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313652987) 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, 56321 + ... + 61638.

It is an arithmetic number, because the mean of its divisors is an integer number (78443400).

Almost surely, 2^313652981 is an apocalyptic number.

It is an amenable number.

313652981 is a deficient number, since it is larger than the sum of its proper divisors (120619).

313652981 is a wasteful number, since it uses less digits than its factorization.

313652981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120618.

The product of its digits is 38880, while the sum is 38.

The square root of 313652981 is about 17710.2507322737. The cubic root of 313652981 is about 679.4379590267.

The spelling of 313652981 in words is "three hundred thirteen million, six hundred fifty-two thousand, nine hundred eighty-one".