39928079 has 2 divisors, whose sum is σ = 39928080. Its totient is φ = 39928078.

The previous prime is 39928039. The next prime is 39928111. The reversal of 39928079 is 97082993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39928079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39928039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19964039 + 19964040.

It is an arithmetic number, because the mean of its divisors is an integer number (19964040).

Almost surely, 2^39928079 is an apocalyptic number.

39928079 is a deficient number, since it is larger than the sum of its proper divisors (1).

39928079 is an equidigital number, since it uses as much as digits as its factorization.

39928079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 39928079 is about 6318.8669079195. The cubic root of 39928079 is about 341.7900943975.

The spelling of 39928079 in words is "thirty-nine million, nine hundred twenty-eight thousand, seventy-nine".