40897117 has 2 divisors, whose sum is σ = 40897118. Its totient is φ = 40897116.

The previous prime is 40897093. The next prime is 40897147. The reversal of 40897117 is 71179804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31125241 + 9771876 = 5579^2 + 3126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40897117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40897147) 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, 20448558 + 20448559.

It is an arithmetic number, because the mean of its divisors is an integer number (20448559).

Almost surely, 2^40897117 is an apocalyptic number.

It is an amenable number.

40897117 is a deficient number, since it is larger than the sum of its proper divisors (1).

40897117 is an equidigital number, since it uses as much as digits as its factorization.

40897117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 40897117 is about 6395.0853786326. The cubic root of 40897117 is about 344.5330572991.

It can be divided in two parts, 40897 and 117, that added together give a palindrome (41014).

The spelling of 40897117 in words is "forty million, eight hundred ninety-seven thousand, one hundred seventeen".