86612381 has 8 divisors (see below), whose sum is σ = 87604440. Its totient is φ = 85624128.

The previous prime is 86612371. The next prime is 86612389. The reversal of 86612381 is 18321668.

It can be written as a sum of positive squares in 4 ways, for example, as 34916281 + 51696100 = 5909^2 + 7190^2 .

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 86612381 - 2¹⁸ = 86350237 is a prime.

It is a super-2 number, since 2×86612381² = 15003409084978322, 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 (86612389) 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, 86375 + ... + 87371.

It is an arithmetic number, because the mean of its divisors is an integer number (10950555).

Almost surely, 2^86612381 is an apocalyptic number.

It is an amenable number.

86612381 is a deficient number, since it is larger than the sum of its proper divisors (992059).

86612381 is a wasteful number, since it uses less digits than its factorization.

86612381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903.

The product of its digits is 13824, while the sum is 35.

The square root of 86612381 is about 9306.5772978040. The cubic root of 86612381 is about 442.4457141317.

The spelling of 86612381 in words is "eighty-six million, six hundred twelve thousand, three hundred eighty-one".