40918957 has 2 divisors, whose sum is σ = 40918958. Its totient is φ = 40918956.

The previous prime is 40918931. The next prime is 40918963. The reversal of 40918957 is 75981904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40883236 + 35721 = 6394^2 + 189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40918957 is a prime.

It is a super-2 number, since 2×40918957² = 3348722083935698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40918987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20459478 + 20459479.

It is an arithmetic number, because the mean of its divisors is an integer number (20459479).

Almost surely, 2^40918957 is an apocalyptic number.

It is an amenable number.

40918957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40918957 is an equidigital number, since it uses as much as digits as its factorization.

40918957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 40918957 is about 6396.7927119768. The cubic root of 40918957 is about 344.5943759077.

The spelling of 40918957 in words is "forty million, nine hundred eighteen thousand, nine hundred fifty-seven".