86915641 has 2 divisors, whose sum is σ = 86915642. Its totient is φ = 86915640.

The previous prime is 86915617. The next prime is 86915659. The reversal of 86915641 is 14651968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76650025 + 10265616 = 8755^2 + 3204^2 .

It is a cyclic number.

It is not a de Polignac number, because 86915641 - 2¹⁷ = 86784569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86915594 and 86915603.

It is not a weakly prime, because it can be changed into another prime (86915141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43457820 + 43457821.

It is an arithmetic number, because the mean of its divisors is an integer number (43457821).

Almost surely, 2^86915641 is an apocalyptic number.

It is an amenable number.

86915641 is a deficient number, since it is larger than the sum of its proper divisors (1).

86915641 is an equidigital number, since it uses as much as digits as its factorization.

86915641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 86915641 is about 9322.8558392802. The cubic root of 86915641 is about 442.9614979438.

The spelling of 86915641 in words is "eighty-six million, nine hundred fifteen thousand, six hundred forty-one".