404975407 has 2 divisors, whose sum is σ = 404975408. Its totient is φ = 404975406.

The previous prime is 404975399. The next prime is 404975429. The reversal of 404975407 is 704579404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404975407 - 2³ = 404975399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404975407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404975447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202487703 + 202487704.

It is an arithmetic number, because the mean of its divisors is an integer number (202487704).

Almost surely, 2^404975407 is an apocalyptic number.

404975407 is a deficient number, since it is larger than the sum of its proper divisors (1).

404975407 is an equidigital number, since it uses as much as digits as its factorization.

404975407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 404975407 is about 20124.0007702246. Note that the first 3 decimals coincide. The cubic root of 404975407 is about 739.8486463038.

The spelling of 404975407 in words is "four hundred four million, nine hundred seventy-five thousand, four hundred seven".