40340957 has 2 divisors, whose sum is σ = 40340958. Its totient is φ = 40340956.

The previous prime is 40340953. The next prime is 40340969. The reversal of 40340957 is 75904304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37222201 + 3118756 = 6101^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 40340957 - 2² = 40340953 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40340953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170478 + 20170479.

It is an arithmetic number, because the mean of its divisors is an integer number (20170479).

Almost surely, 2^40340957 is an apocalyptic number.

It is an amenable number.

40340957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40340957 is an equidigital number, since it uses as much as digits as its factorization.

40340957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 40340957 is about 6351.4531408175. The cubic root of 40340957 is about 342.9641551789.

The spelling of 40340957 in words is "forty million, three hundred forty thousand, nine hundred fifty-seven".