408494731 has 2 divisors, whose sum is σ = 408494732. Its totient is φ = 408494730.

The previous prime is 408494633. The next prime is 408494741. The reversal of 408494731 is 137494804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408494731 - 2¹¹ = 408492683 is a prime.

It is a super-2 number, since 2×408494731² = 333735890509524722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (408494741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204247365 + 204247366.

It is an arithmetic number, because the mean of its divisors is an integer number (204247366).

Almost surely, 2^408494731 is an apocalyptic number.

408494731 is a deficient number, since it is larger than the sum of its proper divisors (1).

408494731 is an equidigital number, since it uses as much as digits as its factorization.

408494731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 408494731 is about 20211.2525836476. The cubic root of 408494731 is about 741.9856162889.

The spelling of 408494731 in words is "four hundred eight million, four hundred ninety-four thousand, seven hundred thirty-one".