40656899 has 2 divisors, whose sum is σ = 40656900. Its totient is φ = 40656898.

The previous prime is 40656857. The next prime is 40656919. The reversal of 40656899 is 99865604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40656899 - 2⁸ = 40656643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40656829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20328449 + 20328450.

It is an arithmetic number, because the mean of its divisors is an integer number (20328450).

Almost surely, 2^40656899 is an apocalyptic number.

40656899 is a deficient number, since it is larger than the sum of its proper divisors (1).

40656899 is an equidigital number, since it uses as much as digits as its factorization.

40656899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 40656899 is about 6376.2762644039. The cubic root of 40656899 is about 343.8571692736.

The spelling of 40656899 in words is "forty million, six hundred fifty-six thousand, eight hundred ninety-nine".