40631599 has 2 divisors, whose sum is σ = 40631600. Its totient is φ = 40631598.

The previous prime is 40631573. The next prime is 40631609. The reversal of 40631599 is 99513604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40631599 - 2⁵ = 40631567 is a prime.

It is equal to p_2469691 and since 40631599 and 2469691 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40631399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20315799 + 20315800.

It is an arithmetic number, because the mean of its divisors is an integer number (20315800).

Almost surely, 2^40631599 is an apocalyptic number.

40631599 is a deficient number, since it is larger than the sum of its proper divisors (1).

40631599 is an equidigital number, since it uses as much as digits as its factorization.

40631599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 40631599 is about 6374.2920391209. The cubic root of 40631599 is about 343.7858292571.

The spelling of 40631599 in words is "forty million, six hundred thirty-one thousand, five hundred ninety-nine".