79247117 has 2 divisors, whose sum is σ = 79247118. Its totient is φ = 79247116.

The previous prime is 79247099. The next prime is 79247141. The reversal of 79247117 is 71174297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43414921 + 35832196 = 6589^2 + 5986^2 .

It is an emirp because it is prime and its reverse (71174297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79247117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79246117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39623558 + 39623559.

It is an arithmetic number, because the mean of its divisors is an integer number (39623559).

Almost surely, 2^79247117 is an apocalyptic number.

It is an amenable number.

79247117 is a deficient number, since it is larger than the sum of its proper divisors (1).

79247117 is an equidigital number, since it uses as much as digits as its factorization.

79247117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 79247117 is about 8902.0849804975. The cubic root of 79247117 is about 429.5309776933.

The spelling of 79247117 in words is "seventy-nine million, two hundred forty-seven thousand, one hundred seventeen".