404020651 has 2 divisors, whose sum is σ = 404020652. Its totient is φ = 404020650.

The previous prime is 404020633. The next prime is 404020699. The reversal of 404020651 is 156020404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404020651 - 2⁷ = 404020523 is a prime.

It is not a weakly prime, because it can be changed into another prime (404020051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202010325 + 202010326.

It is an arithmetic number, because the mean of its divisors is an integer number (202010326).

Almost surely, 2^404020651 is an apocalyptic number.

404020651 is a deficient number, since it is larger than the sum of its proper divisors (1).

404020651 is an equidigital number, since it uses as much as digits as its factorization.

404020651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 404020651 is about 20100.2649485025. The cubic root of 404020651 is about 739.2667749453.

The spelling of 404020651 in words is "four hundred four million, twenty thousand, six hundred fifty-one".