401366587 has 2 divisors, whose sum is σ = 401366588. Its totient is φ = 401366586.

The previous prime is 401366573. The next prime is 401366591. The reversal of 401366587 is 785663104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401366587 - 2²⁷ = 267148859 is a prime.

It is a super-2 number, since 2×401366587² = 322190274320057138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401366527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200683293 + 200683294.

It is an arithmetic number, because the mean of its divisors is an integer number (200683294).

Almost surely, 2^401366587 is an apocalyptic number.

401366587 is a deficient number, since it is larger than the sum of its proper divisors (1).

401366587 is an equidigital number, since it uses as much as digits as its factorization.

401366587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 401366587 is about 20034.1355441157. The cubic root of 401366587 is about 737.6444375536.

The spelling of 401366587 in words is "four hundred one million, three hundred sixty-six thousand, five hundred eighty-seven".