39995953 has 2 divisors, whose sum is σ = 39995954. Its totient is φ = 39995952.

The previous prime is 39995947. The next prime is 39995971. The reversal of 39995953 is 35959993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31281649 + 8714304 = 5593^2 + 2952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39995953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39995953.

It is not a weakly prime, because it can be changed into another prime (39995903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19997976 + 19997977.

It is an arithmetic number, because the mean of its divisors is an integer number (19997977).

Almost surely, 2^39995953 is an apocalyptic number.

It is an amenable number.

39995953 is a deficient number, since it is larger than the sum of its proper divisors (1).

39995953 is an equidigital number, since it uses as much as digits as its factorization.

39995953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1476225, while the sum is 52.

The square root of 39995953 is about 6324.2353688015. The cubic root of 39995953 is about 341.9836551586.

The spelling of 39995953 in words is "thirty-nine million, nine hundred ninety-five thousand, nine hundred fifty-three".