400579087 has 2 divisors, whose sum is σ = 400579088. Its totient is φ = 400579086.

The previous prime is 400579043. The next prime is 400579103. The reversal of 400579087 is 780975004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400579087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400579187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200289543 + 200289544.

It is an arithmetic number, because the mean of its divisors is an integer number (200289544).

Almost surely, 2^400579087 is an apocalyptic number.

400579087 is a deficient number, since it is larger than the sum of its proper divisors (1).

400579087 is an equidigital number, since it uses as much as digits as its factorization.

400579087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 400579087 is about 20014.4719390745. The cubic root of 400579087 is about 737.1616907394.

The spelling of 400579087 in words is "four hundred million, five hundred seventy-nine thousand, eighty-seven".