39952945873 has 2 divisors, whose sum is σ = 39952945874. Its totient is φ = 39952945872.

The previous prime is 39952945871. The next prime is 39952945927. The reversal of 39952945873 is 37854925993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26747948304 + 13204997569 = 163548^2 + 114913^2 .

It is a cyclic number.

It is not a de Polignac number, because 39952945873 - 2¹ = 39952945871 is a prime.

Together with 39952945871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39952945871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19976472936 + 19976472937.

It is an arithmetic number, because the mean of its divisors is an integer number (19976472937).

Almost surely, 2^39952945873 is an apocalyptic number.

It is an amenable number.

39952945873 is a deficient number, since it is larger than the sum of its proper divisors (1).

39952945873 is an equidigital number, since it uses as much as digits as its factorization.

39952945873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73483200, while the sum is 64.

The spelling of 39952945873 in words is "thirty-nine billion, nine hundred fifty-two million, nine hundred forty-five thousand, eight hundred seventy-three".