40012897 has 2 divisors, whose sum is σ = 40012898. Its totient is φ = 40012896.

The previous prime is 40012871. The next prime is 40012913. The reversal of 40012897 is 79821004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20511841 + 19501056 = 4529^2 + 4416^2 .

It is a cyclic number.

It is not a de Polignac number, because 40012897 - 2⁷ = 40012769 is a prime.

It is not a weakly prime, because it can be changed into another prime (40012097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006448 + 20006449.

It is an arithmetic number, because the mean of its divisors is an integer number (20006449).

Almost surely, 2^40012897 is an apocalyptic number.

It is an amenable number.

40012897 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012897 is an equidigital number, since it uses as much as digits as its factorization.

40012897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40012897 is about 6325.5748355387. The cubic root of 40012897 is about 342.0319413187.

The spelling of 40012897 in words is "forty million, twelve thousand, eight hundred ninety-seven".