404675917 has 2 divisors, whose sum is σ = 404675918. Its totient is φ = 404675916.

The previous prime is 404675857. The next prime is 404675941. The reversal of 404675917 is 719576404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260531881 + 144144036 = 16141^2 + 12006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404675917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404675977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202337958 + 202337959.

It is an arithmetic number, because the mean of its divisors is an integer number (202337959).

Almost surely, 2^404675917 is an apocalyptic number.

It is an amenable number.

404675917 is a deficient number, since it is larger than the sum of its proper divisors (1).

404675917 is an equidigital number, since it uses as much as digits as its factorization.

404675917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 404675917 is about 20116.5582791888. The cubic root of 404675917 is about 739.6662221282. Note that the first 3 decimals are identical.

The spelling of 404675917 in words is "four hundred four million, six hundred seventy-five thousand, nine hundred seventeen".