39961297 has 2 divisors, whose sum is σ = 39961298. Its totient is φ = 39961296.

The previous prime is 39961277. The next prime is 39961309. The reversal of 39961297 is 79216993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36590401 + 3370896 = 6049^2 + 1836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39961297 is a prime.

It is not a weakly prime, because it can be changed into another prime (39961277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19980648 + 19980649.

It is an arithmetic number, because the mean of its divisors is an integer number (19980649).

Almost surely, 2^39961297 is an apocalyptic number.

It is an amenable number.

39961297 is a deficient number, since it is larger than the sum of its proper divisors (1).

39961297 is an equidigital number, since it uses as much as digits as its factorization.

39961297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 46.

The square root of 39961297 is about 6321.4948390393. The cubic root of 39961297 is about 341.8848517426.

The spelling of 39961297 in words is "thirty-nine million, nine hundred sixty-one thousand, two hundred ninety-seven".