40396957 has 2 divisors, whose sum is σ = 40396958. Its totient is φ = 40396956.

The previous prime is 40396949. The next prime is 40396963. The reversal of 40396957 is 75969304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39200121 + 1196836 = 6261^2 + 1094^2 .

It is a cyclic number.

It is not a de Polignac number, because 40396957 - 2³ = 40396949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40396927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20198478 + 20198479.

It is an arithmetic number, because the mean of its divisors is an integer number (20198479).

Almost surely, 2^40396957 is an apocalyptic number.

It is an amenable number.

40396957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40396957 is an equidigital number, since it uses as much as digits as its factorization.

40396957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 40396957 is about 6355.8600519521. The cubic root of 40396957 is about 343.1227790187.

The spelling of 40396957 in words is "forty million, three hundred ninety-six thousand, nine hundred fifty-seven".