39970416809 has 2 divisors, whose sum is σ = 39970416810. Its totient is φ = 39970416808.

The previous prime is 39970416799. The next prime is 39970416817. The reversal of 39970416809 is 90861407993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37799136400 + 2171280409 = 194420^2 + 46597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39970416809 is a prime.

It is not a weakly prime, because it can be changed into another prime (39970416859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19985208404 + 19985208405.

It is an arithmetic number, because the mean of its divisors is an integer number (19985208405).

Almost surely, 2^39970416809 is an apocalyptic number.

It is an amenable number.

39970416809 is a deficient number, since it is larger than the sum of its proper divisors (1).

39970416809 is an equidigital number, since it uses as much as digits as its factorization.

39970416809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 39970416809 in words is "thirty-nine billion, nine hundred seventy million, four hundred sixteen thousand, eight hundred nine".