39920785207 has 2 divisors, whose sum is σ = 39920785208. Its totient is φ = 39920785206.

The previous prime is 39920785193. The next prime is 39920785213. The reversal of 39920785207 is 70258702993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39920785207 - 2³⁵ = 5561046839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39920785507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19960392603 + 19960392604.

It is an arithmetic number, because the mean of its divisors is an integer number (19960392604).

Almost surely, 2^39920785207 is an apocalyptic number.

39920785207 is a deficient number, since it is larger than the sum of its proper divisors (1).

39920785207 is an equidigital number, since it uses as much as digits as its factorization.

39920785207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 39920785207 in words is "thirty-nine billion, nine hundred twenty million, seven hundred eighty-five thousand, two hundred seven".