39975217 has 2 divisors, whose sum is σ = 39975218. Its totient is φ = 39975216.

The previous prime is 39975193. The next prime is 39975223. The reversal of 39975217 is 71257993.

39975217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32307856 + 7667361 = 5684^2 + 2769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39975217 is a prime.

It is not a weakly prime, because it can be changed into another prime (39975017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987608 + 19987609.

It is an arithmetic number, because the mean of its divisors is an integer number (19987609).

Almost surely, 2^39975217 is an apocalyptic number.

It is an amenable number.

39975217 is a deficient number, since it is larger than the sum of its proper divisors (1).

39975217 is an equidigital number, since it uses as much as digits as its factorization.

39975217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 43.

The square root of 39975217 is about 6322.5957485830. The cubic root of 39975217 is about 341.9245441869.

The spelling of 39975217 in words is "thirty-nine million, nine hundred seventy-five thousand, two hundred seventeen".