79102109 has 2 divisors, whose sum is σ = 79102110. Its totient is φ = 79102108.

The previous prime is 79102099. The next prime is 79102117. The reversal of 79102109 is 90120197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 2592100 = 8747^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79102109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79101109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39551054 + 39551055.

It is an arithmetic number, because the mean of its divisors is an integer number (39551055).

Almost surely, 2^79102109 is an apocalyptic number.

It is an amenable number.

79102109 is a deficient number, since it is larger than the sum of its proper divisors (1).

79102109 is an equidigital number, since it uses as much as digits as its factorization.

79102109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 79102109 is about 8893.9366424548. The cubic root of 79102109 is about 429.2688295361.

The spelling of 79102109 in words is "seventy-nine million, one hundred two thousand, one hundred nine".