404040587 has 2 divisors, whose sum is σ = 404040588. Its totient is φ = 404040586.

The previous prime is 404040503. The next prime is 404040589. The reversal of 404040587 is 785040404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404040587 - 2¹⁰ = 404039563 is a prime.

Together with 404040589, 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 (404040589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202020293 + 202020294.

It is an arithmetic number, because the mean of its divisors is an integer number (202020294).

Almost surely, 2^404040587 is an apocalyptic number.

404040587 is a deficient number, since it is larger than the sum of its proper divisors (1).

404040587 is an equidigital number, since it uses as much as digits as its factorization.

404040587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 404040587 is about 20100.7608562462. The cubic root of 404040587 is about 739.2789342082.

The spelling of 404040587 in words is "four hundred four million, forty thousand, five hundred eighty-seven".