39931228873 has 2 divisors, whose sum is σ = 39931228874. Its totient is φ = 39931228872.

The previous prime is 39931228859. The next prime is 39931228879. The reversal of 39931228873 is 37882213993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39909251529 + 21977344 = 199773^2 + 4688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39931228873 is a prime.

It is not a weakly prime, because it can be changed into another prime (39931228879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19965614436 + 19965614437.

It is an arithmetic number, because the mean of its divisors is an integer number (19965614437).

Almost surely, 2^39931228873 is an apocalyptic number.

It is an amenable number.

39931228873 is a deficient number, since it is larger than the sum of its proper divisors (1).

39931228873 is an equidigital number, since it uses as much as digits as its factorization.

39931228873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 55.

The spelling of 39931228873 in words is "thirty-nine billion, nine hundred thirty-one million, two hundred twenty-eight thousand, eight hundred seventy-three".