86131637 has 2 divisors, whose sum is σ = 86131638. Its totient is φ = 86131636.

The previous prime is 86131631. The next prime is 86131687. The reversal of 86131637 is 73613168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 21473956 = 8041^2 + 4634^2 .

It is a cyclic number.

It is not a de Polignac number, because 86131637 - 2¹² = 86127541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86131597 and 86131606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86131631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43065818 + 43065819.

It is an arithmetic number, because the mean of its divisors is an integer number (43065819).

Almost surely, 2^86131637 is an apocalyptic number.

It is an amenable number.

86131637 is a deficient number, since it is larger than the sum of its proper divisors (1).

86131637 is an equidigital number, since it uses as much as digits as its factorization.

86131637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 86131637 is about 9280.7131730272. The cubic root of 86131637 is about 441.6255932059.

It can be divided in two parts, 86131 and 637, that added together give a palindrome (86768).

The spelling of 86131637 in words is "eighty-six million, one hundred thirty-one thousand, six hundred thirty-seven".