79979429 has 2 divisors, whose sum is σ = 79979430. Its totient is φ = 79979428.

The previous prime is 79979413. The next prime is 79979437. The reversal of 79979429 is 92497997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 26030404 = 7345^2 + 5102^2 .

It is an emirp because it is prime and its reverse (92497997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79979429 - 2⁴ = 79979413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79979629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39989714 + 39989715.

It is an arithmetic number, because the mean of its divisors is an integer number (39989715).

Almost surely, 2^79979429 is an apocalyptic number.

It is an amenable number.

79979429 is a deficient number, since it is larger than the sum of its proper divisors (1).

79979429 is an equidigital number, since it uses as much as digits as its factorization.

79979429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 56.

The square root of 79979429 is about 8943.1218822065. The cubic root of 79979429 is about 430.8500024437.

It can be divided in two parts, 79979 and 429, that added together give a palindrome (80408).

The spelling of 79979429 in words is "seventy-nine million, nine hundred seventy-nine thousand, four hundred twenty-nine".