86317481 has 2 divisors, whose sum is σ = 86317482. Its totient is φ = 86317480.

The previous prime is 86317433. The next prime is 86317493. The reversal of 86317481 is 18471368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85285225 + 1032256 = 9235^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 86317481 - 2¹⁰ = 86316457 is a prime.

It is a super-2 number, since 2×86317481² = 14901415052370722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86317421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43158740 + 43158741.

It is an arithmetic number, because the mean of its divisors is an integer number (43158741).

Almost surely, 2^86317481 is an apocalyptic number.

It is an amenable number.

86317481 is a deficient number, since it is larger than the sum of its proper divisors (1).

86317481 is an equidigital number, since it uses as much as digits as its factorization.

86317481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 86317481 is about 9290.7201550795. The cubic root of 86317481 is about 441.9429930642.

The spelling of 86317481 in words is "eighty-six million, three hundred seventeen thousand, four hundred eighty-one".