86981313 has 8 divisors (see below), whose sum is σ = 116342208. Its totient is φ = 57803984.

The previous prime is 86981309. The next prime is 86981317. The reversal of 86981313 is 31318968.

It is an interprime number because it is at equal distance from previous prime (86981309) and next prime (86981317).

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

It is a cyclic number.

It is not a de Polignac number, because 86981313 - 2² = 86981309 is a prime.

It is a super-2 number, since 2×86981313² = 15131497622407938, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86981317) 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, 44781 + ... + 46682.

It is an arithmetic number, because the mean of its divisors is an integer number (14542776).

Almost surely, 2^86981313 is an apocalyptic number.

It is an amenable number.

86981313 is a deficient number, since it is larger than the sum of its proper divisors (29360895).

86981313 is a wasteful number, since it uses less digits than its factorization.

86981313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91783.

The product of its digits is 31104, while the sum is 39.

The square root of 86981313 is about 9326.3772709450. The cubic root of 86981313 is about 443.0730346153.

It can be divided in two parts, 8698 and 1313, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 86981313 in words is "eighty-six million, nine hundred eighty-one thousand, three hundred thirteen".