404370641 has 2 divisors, whose sum is σ = 404370642. Its totient is φ = 404370640.

The previous prime is 404370623. The next prime is 404370643. The reversal of 404370641 is 146073404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403206400 + 1164241 = 20080^2 + 1079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404370641 is a prime.

Together with 404370643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404370643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202185320 + 202185321.

It is an arithmetic number, because the mean of its divisors is an integer number (202185321).

Almost surely, 2^404370641 is an apocalyptic number.

It is an amenable number.

404370641 is a deficient number, since it is larger than the sum of its proper divisors (1).

404370641 is an equidigital number, since it uses as much as digits as its factorization.

404370641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 404370641 is about 20108.9691680106. The cubic root of 404370641 is about 739.4801809534.

The spelling of 404370641 in words is "four hundred four million, three hundred seventy thousand, six hundred forty-one".