79012321 has 2 divisors, whose sum is σ = 79012322. Its totient is φ = 79012320.

The previous prime is 79012319. The next prime is 79012333. The reversal of 79012321 is 12321097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59120721 + 19891600 = 7689^2 + 4460^2 .

It is a cyclic number.

It is not a de Polignac number, because 79012321 - 2¹ = 79012319 is a prime.

Together with 79012319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79012361) 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, 39506160 + 39506161.

It is an arithmetic number, because the mean of its divisors is an integer number (39506161).

Almost surely, 2^79012321 is an apocalyptic number.

It is an amenable number.

79012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

79012321 is an equidigital number, since it uses as much as digits as its factorization.

79012321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 79012321 is about 8888.8875006943. The cubic root of 79012321 is about 429.1063484818.

The spelling of 79012321 in words is "seventy-nine million, twelve thousand, three hundred twenty-one".