79948284989 has 2 divisors, whose sum is σ = 79948284990. Its totient is φ = 79948284988.

The previous prime is 79948284973. The next prime is 79948285007. The reversal of 79948284989 is 98948284997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70158765625 + 9789519364 = 264875^2 + 98942^2 .

It is an emirp because it is prime and its reverse (98948284997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79948284989 - 2⁴ = 79948284973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79948284959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39974142494 + 39974142495.

It is an arithmetic number, because the mean of its divisors is an integer number (39974142495).

Almost surely, 2^79948284989 is an apocalyptic number.

It is an amenable number.

79948284989 is a deficient number, since it is larger than the sum of its proper divisors (1).

79948284989 is an equidigital number, since it uses as much as digits as its factorization.

79948284989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752467968, while the sum is 77.

The spelling of 79948284989 in words is "seventy-nine billion, nine hundred forty-eight million, two hundred eighty-four thousand, nine hundred eighty-nine".