86616631 has 2 divisors, whose sum is σ = 86616632. Its totient is φ = 86616630.

The previous prime is 86616589. The next prime is 86616653. The reversal of 86616631 is 13661668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86616631 is a prime.

It is a super-2 number, since 2×86616631² = 15004881531580322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86616671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43308315 + 43308316.

It is an arithmetic number, because the mean of its divisors is an integer number (43308316).

Almost surely, 2^86616631 is an apocalyptic number.

86616631 is a deficient number, since it is larger than the sum of its proper divisors (1).

86616631 is an equidigital number, since it uses as much as digits as its factorization.

86616631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 86616631 is about 9306.8056281412. The cubic root of 86616631 is about 442.4529508320.

The spelling of 86616631 in words is "eighty-six million, six hundred sixteen thousand, six hundred thirty-one".