39720574807 has 2 divisors, whose sum is σ = 39720574808. Its totient is φ = 39720574806.

The previous prime is 39720574781. The next prime is 39720574843. The reversal of 39720574807 is 70847502793.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39720574807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39720574207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19860287403 + 19860287404.

It is an arithmetic number, because the mean of its divisors is an integer number (19860287404).

Almost surely, 2^39720574807 is an apocalyptic number.

39720574807 is a deficient number, since it is larger than the sum of its proper divisors (1).

39720574807 is an equidigital number, since it uses as much as digits as its factorization.

39720574807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 39720574807 in words is "thirty-nine billion, seven hundred twenty million, five hundred seventy-four thousand, eight hundred seven".