40157699 has 2 divisors, whose sum is σ = 40157700. Its totient is φ = 40157698.

The previous prime is 40157687. The next prime is 40157713. The reversal of 40157699 is 99675104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40157699 - 2⁸ = 40157443 is a prime.

It is a super-2 number, since 2×40157699² = 3225281577949202, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40157629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078849 + 20078850.

It is an arithmetic number, because the mean of its divisors is an integer number (20078850).

Almost surely, 2^40157699 is an apocalyptic number.

40157699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157699 is an equidigital number, since it uses as much as digits as its factorization.

40157699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 40157699 is about 6337.0102572112. The cubic root of 40157699 is about 342.4440358238. Note that the first 3 decimals are identical.

The spelling of 40157699 in words is "forty million, one hundred fifty-seven thousand, six hundred ninety-nine".