79323121 has 2 divisors, whose sum is σ = 79323122. Its totient is φ = 79323120.

The previous prime is 79323103. The next prime is 79323131. The reversal of 79323121 is 12132397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 29550096 = 7055^2 + 5436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79323121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79323121.

It is not a weakly prime, because it can be changed into another prime (79323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39661560 + 39661561.

It is an arithmetic number, because the mean of its divisors is an integer number (39661561).

Almost surely, 2^79323121 is an apocalyptic number.

It is an amenable number.

79323121 is a deficient number, since it is larger than the sum of its proper divisors (1).

79323121 is an equidigital number, since it uses as much as digits as its factorization.

79323121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 79323121 is about 8906.3528450202. The cubic root of 79323121 is about 429.6682514203.

The spelling of 79323121 in words is "seventy-nine million, three hundred twenty-three thousand, one hundred twenty-one".