39564901 has 2 divisors, whose sum is σ = 39564902. Its totient is φ = 39564900.

The previous prime is 39564881. The next prime is 39564911. The reversal of 39564901 is 10946593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26532801 + 13032100 = 5151^2 + 3610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39564901 is a prime.

It is a super-2 number, since 2×39564901² = 3130762782279602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39564911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19782450 + 19782451.

It is an arithmetic number, because the mean of its divisors is an integer number (19782451).

Almost surely, 2^39564901 is an apocalyptic number.

It is an amenable number.

39564901 is a deficient number, since it is larger than the sum of its proper divisors (1).

39564901 is an equidigital number, since it uses as much as digits as its factorization.

39564901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 39564901 is about 6290.0636721738. The cubic root of 39564901 is about 340.7506511831.

The spelling of 39564901 in words is "thirty-nine million, five hundred sixty-four thousand, nine hundred one".