408940589 has 2 divisors, whose sum is σ = 408940590. Its totient is φ = 408940588.

The previous prime is 408940579. The next prime is 408940639. The reversal of 408940589 is 985049804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351862564 + 57078025 = 18758^2 + 7555^2 .

It is a cyclic number.

It is not a de Polignac number, because 408940589 - 2¹⁶ = 408875053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408940549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204470294 + 204470295.

It is an arithmetic number, because the mean of its divisors is an integer number (204470295).

Almost surely, 2^408940589 is an apocalyptic number.

It is an amenable number.

408940589 is a deficient number, since it is larger than the sum of its proper divisors (1).

408940589 is an equidigital number, since it uses as much as digits as its factorization.

408940589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 408940589 is about 20222.2795203706. The cubic root of 408940589 is about 742.2554687587.

The spelling of 408940589 in words is "four hundred eight million, nine hundred forty thousand, five hundred eighty-nine".