40685699 has 2 divisors, whose sum is σ = 40685700. Its totient is φ = 40685698.

The previous prime is 40685677. The next prime is 40685713. The reversal of 40685699 is 99658604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40685699 - 2²⁴ = 23908483 is a prime.

It is a super-2 number, since 2×40685699² = 3310652206237202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40685629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20342849 + 20342850.

It is an arithmetic number, because the mean of its divisors is an integer number (20342850).

Almost surely, 2^40685699 is an apocalyptic number.

40685699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40685699 is an equidigital number, since it uses as much as digits as its factorization.

40685699 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 40685699 is about 6378.5342360138. The cubic root of 40685699 is about 343.9383424512.

The spelling of 40685699 in words is "forty million, six hundred eighty-five thousand, six hundred ninety-nine".