79920329 has 2 divisors, whose sum is σ = 79920330. Its totient is φ = 79920328.

The previous prime is 79920293. The next prime is 79920341. The reversal of 79920329 is 92302997.

Together with previous prime (79920293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76125625 + 3794704 = 8725^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 79920329 - 2⁸ = 79920073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79920229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39960164 + 39960165.

It is an arithmetic number, because the mean of its divisors is an integer number (39960165).

Almost surely, 2^79920329 is an apocalyptic number.

It is an amenable number.

79920329 is a deficient number, since it is larger than the sum of its proper divisors (1).

79920329 is an equidigital number, since it uses as much as digits as its factorization.

79920329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 79920329 is about 8939.8170562937. The cubic root of 79920329 is about 430.7438521916.

The spelling of 79920329 in words is "seventy-nine million, nine hundred twenty thousand, three hundred twenty-nine".