404942887 has 2 divisors, whose sum is σ = 404942888. Its totient is φ = 404942886.

The previous prime is 404942869. The next prime is 404942903. The reversal of 404942887 is 788249404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404942887 - 2¹⁵ = 404910119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404946887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202471443 + 202471444.

It is an arithmetic number, because the mean of its divisors is an integer number (202471444).

Almost surely, 2^404942887 is an apocalyptic number.

404942887 is a deficient number, since it is larger than the sum of its proper divisors (1).

404942887 is an equidigital number, since it uses as much as digits as its factorization.

404942887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 404942887 is about 20123.1927635751. The cubic root of 404942887 is about 739.8288422024.

The spelling of 404942887 in words is "four hundred four million, nine hundred forty-two thousand, eight hundred eighty-seven".