40457917 has 2 divisors, whose sum is σ = 40457918. Its totient is φ = 40457916.

The previous prime is 40457903. The next prime is 40457941. The reversal of 40457917 is 71975404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 5812921 = 5886^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 40457917 - 2²³ = 32069309 is a 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 (40457947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20228958 + 20228959.

It is an arithmetic number, because the mean of its divisors is an integer number (20228959).

Almost surely, 2^40457917 is an apocalyptic number.

It is an amenable number.

40457917 is a deficient number, since it is larger than the sum of its proper divisors (1).

40457917 is an equidigital number, since it uses as much as digits as its factorization.

40457917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 40457917 is about 6360.6538185944. The cubic root of 40457917 is about 343.2952858415.

The spelling of 40457917 in words is "forty million, four hundred fifty-seven thousand, nine hundred seventeen".