79494702137 has 2 divisors, whose sum is σ = 79494702138. Its totient is φ = 79494702136.

The previous prime is 79494702109. The next prime is 79494702143. The reversal of 79494702137 is 73120749497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79450133161 + 44568976 = 281869^2 + 6676^2 .

It is an emirp because it is prime and its reverse (73120749497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79494702137 - 2¹⁶ = 79494636601 is a prime.

It is not a weakly prime, because it can be changed into another prime (79494701137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39747351068 + 39747351069.

It is an arithmetic number, because the mean of its divisors is an integer number (39747351069).

Almost surely, 2^79494702137 is an apocalyptic number.

It is an amenable number.

79494702137 is a deficient number, since it is larger than the sum of its proper divisors (1).

79494702137 is an equidigital number, since it uses as much as digits as its factorization.

79494702137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 79494702137 in words is "seventy-nine billion, four hundred ninety-four million, seven hundred two thousand, one hundred thirty-seven".