40685759 has 2 divisors, whose sum is σ = 40685760. Its totient is φ = 40685758.

The previous prime is 40685737. The next prime is 40685767. The reversal of 40685759 is 95758604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40685759 - 2²⁴ = 23908543 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40685779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20342879 + 20342880.

It is an arithmetic number, because the mean of its divisors is an integer number (20342880).

Almost surely, 2^40685759 is an apocalyptic number.

40685759 is a deficient number, since it is larger than the sum of its proper divisors (1).

40685759 is an equidigital number, since it uses as much as digits as its factorization.

40685759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 40685759 is about 6378.5389392870. The cubic root of 40685759 is about 343.9385115220.

The spelling of 40685759 in words is "forty million, six hundred eighty-five thousand, seven hundred fifty-nine".