40372897 has 2 divisors, whose sum is σ = 40372898. Its totient is φ = 40372896.

The previous prime is 40372879. The next prime is 40372903. The reversal of 40372897 is 79827304.

Together with previous prime (40372879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38825361 + 1547536 = 6231^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 40372897 - 2²³ = 31984289 is a prime.

It is not a weakly prime, because it can be changed into another prime (40372817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20186448 + 20186449.

It is an arithmetic number, because the mean of its divisors is an integer number (20186449).

Almost surely, 2^40372897 is an apocalyptic number.

It is an amenable number.

40372897 is a deficient number, since it is larger than the sum of its proper divisors (1).

40372897 is an equidigital number, since it uses as much as digits as its factorization.

40372897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 40372897 is about 6353.9670285578. The cubic root of 40372897 is about 343.0546453919.

The spelling of 40372897 in words is "forty million, three hundred seventy-two thousand, eight hundred ninety-seven".