79338839009 has 2 divisors, whose sum is σ = 79338839010. Its totient is φ = 79338839008.

The previous prime is 79338838963. The next prime is 79338839053. The reversal of 79338839009 is 90093883397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45667690000 + 33671149009 = 213700^2 + 183497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79338839009 is a prime.

It is not a weakly prime, because it can be changed into another prime (79338839509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39669419504 + 39669419505.

It is an arithmetic number, because the mean of its divisors is an integer number (39669419505).

Almost surely, 2^79338839009 is an apocalyptic number.

It is an amenable number.

79338839009 is a deficient number, since it is larger than the sum of its proper divisors (1).

79338839009 is an equidigital number, since it uses as much as digits as its factorization.

79338839009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 79338839009 in words is "seventy-nine billion, three hundred thirty-eight million, eight hundred thirty-nine thousand, nine".