408791623 has 2 divisors, whose sum is σ = 408791624. Its totient is φ = 408791622.

The previous prime is 408791587. The next prime is 408791693. The reversal of 408791623 is 326197804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 408791623 - 2⁹ = 408791111 is a prime.

It is a super-2 number, since 2×408791623² = 334221182069948258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408791693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204395811 + 204395812.

It is an arithmetic number, because the mean of its divisors is an integer number (204395812).

Almost surely, 2^408791623 is an apocalyptic number.

408791623 is a deficient number, since it is larger than the sum of its proper divisors (1).

408791623 is an equidigital number, since it uses as much as digits as its factorization.

408791623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 408791623 is about 20218.5959700470. The cubic root of 408791623 is about 742.1653299465.

The spelling of 408791623 in words is "four hundred eight million, seven hundred ninety-one thousand, six hundred twenty-three".