39720574889 has 2 divisors, whose sum is σ = 39720574890. Its totient is φ = 39720574888.

The previous prime is 39720574871. The next prime is 39720574903. The reversal of 39720574889 is 98847502793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39154515625 + 566059264 = 197875^2 + 23792^2 .

It is a cyclic number.

It is not a de Polignac number, because 39720574889 - 2¹² = 39720570793 is a prime.

It is not a weakly prime, because it can be changed into another prime (39720574489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19860287444 + 19860287445.

It is an arithmetic number, because the mean of its divisors is an integer number (19860287445).

Almost surely, 2^39720574889 is an apocalyptic number.

It is an amenable number.

39720574889 is a deficient number, since it is larger than the sum of its proper divisors (1).

39720574889 is an equidigital number, since it uses as much as digits as its factorization.

39720574889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 39720574889 in words is "thirty-nine billion, seven hundred twenty million, five hundred seventy-four thousand, eight hundred eighty-nine".