409396645 has 16 divisors (see below), whose sum is σ = 572054400. Its totient is φ = 275431104.

The previous prime is 409396639. The next prime is 409396651. The reversal of 409396645 is 546693904.

It is an interprime number because it is at equal distance from previous prime (409396639) and next prime (409396651).

It is a cyclic number.

It is not a de Polignac number, because 409396645 - 2²³ = 401008037 is a prime.

It is a super-2 number, since 2×409396645² = 335211225874512050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 409396595 and 409396604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108495 + ... + 112204.

It is an arithmetic number, because the mean of its divisors is an integer number (35753400).

Almost surely, 2^409396645 is an apocalyptic number.

It is an amenable number.

409396645 is a deficient number, since it is larger than the sum of its proper divisors (162657755).

409396645 is a wasteful number, since it uses less digits than its factorization.

409396645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220764.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 409396645 is about 20233.5524562544. The cubic root of 409396645 is about 742.5312906508.

The spelling of 409396645 in words is "four hundred nine million, three hundred ninety-six thousand, six hundred forty-five".