79917481429 has 2 divisors, whose sum is σ = 79917481430. Its totient is φ = 79917481428.

The previous prime is 79917481349. The next prime is 79917481451. The reversal of 79917481429 is 92418471997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47974140900 + 31943340529 = 219030^2 + 178727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79917481429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79917481459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39958740714 + 39958740715.

It is an arithmetic number, because the mean of its divisors is an integer number (39958740715).

Almost surely, 2^79917481429 is an apocalyptic number.

It is an amenable number.

79917481429 is a deficient number, since it is larger than the sum of its proper divisors (1).

79917481429 is an equidigital number, since it uses as much as digits as its factorization.

79917481429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 61.

The spelling of 79917481429 in words is "seventy-nine billion, nine hundred seventeen million, four hundred eighty-one thousand, four hundred twenty-nine".