86744731 has 2 divisors, whose sum is σ = 86744732. Its totient is φ = 86744730.

The previous prime is 86744719. The next prime is 86744797. The reversal of 86744731 is 13744768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86744731 - 2¹⁹ = 86220443 is a prime.

It is a super-2 number, since 2×86744731² = 15049296712524722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86744131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43372365 + 43372366.

It is an arithmetic number, because the mean of its divisors is an integer number (43372366).

Almost surely, 2^86744731 is an apocalyptic number.

86744731 is a deficient number, since it is larger than the sum of its proper divisors (1).

86744731 is an equidigital number, since it uses as much as digits as its factorization.

86744731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 86744731 is about 9313.6851460633. The cubic root of 86744731 is about 442.6709624856.

The spelling of 86744731 in words is "eighty-six million, seven hundred forty-four thousand, seven hundred thirty-one".