40897957 has 2 divisors, whose sum is σ = 40897958. Its totient is φ = 40897956.

The previous prime is 40897931. The next prime is 40897963. The reversal of 40897957 is 75979804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 1572516 = 6271^2 + 1254^2 .

It is a cyclic number.

It is not a de Polignac number, because 40897957 - 2¹⁵ = 40865189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40897957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40897907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20448978 + 20448979.

It is an arithmetic number, because the mean of its divisors is an integer number (20448979).

Almost surely, 2^40897957 is an apocalyptic number.

It is an amenable number.

40897957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40897957 is an equidigital number, since it uses as much as digits as its factorization.

40897957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 40897957 is about 6395.1510537281. The cubic root of 40897957 is about 344.5354161108.

The spelling of 40897957 in words is "forty million, eight hundred ninety-seven thousand, nine hundred fifty-seven".