79641329 has 2 divisors, whose sum is σ = 79641330. Its totient is φ = 79641328.

The previous prime is 79641307. The next prime is 79641343. The reversal of 79641329 is 92314697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 1495729 = 8840^2 + 1223^2 .

It is a cyclic number.

It is not a de Polignac number, because 79641329 - 2²⁰ = 78592753 is a prime.

It is a super-4 number, since 4×79641329⁴ (a number of 33 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (79641349) 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, 39820664 + 39820665.

It is an arithmetic number, because the mean of its divisors is an integer number (39820665).

Almost surely, 2^79641329 is an apocalyptic number.

It is an amenable number.

79641329 is a deficient number, since it is larger than the sum of its proper divisors (1).

79641329 is an equidigital number, since it uses as much as digits as its factorization.

79641329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 79641329 is about 8924.1990677035. The cubic root of 79641329 is about 430.2420288809.

The spelling of 79641329 in words is "seventy-nine million, six hundred forty-one thousand, three hundred twenty-nine".