79630321 has 2 divisors, whose sum is σ = 79630322. Its totient is φ = 79630320.

The previous prime is 79630297. The next prime is 79630333. The reversal of 79630321 is 12303697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50253921 + 29376400 = 7089^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 79630321 - 2¹³ = 79622129 is a prime.

It is not a weakly prime, because it can be changed into another prime (79630381) 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, 39815160 + 39815161.

It is an arithmetic number, because the mean of its divisors is an integer number (39815161).

Almost surely, 2^79630321 is an apocalyptic number.

It is an amenable number.

79630321 is a deficient number, since it is larger than the sum of its proper divisors (1).

79630321 is an equidigital number, since it uses as much as digits as its factorization.

79630321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 79630321 is about 8923.5822963651. The cubic root of 79630321 is about 430.2222053272. Note that the first 4 decimals are identical.

The spelling of 79630321 in words is "seventy-nine million, six hundred thirty thousand, three hundred twenty-one".