79620829 has 2 divisors, whose sum is σ = 79620830. Its totient is φ = 79620828.

The previous prime is 79620791. The next prime is 79620839. The reversal of 79620829 is 92802697.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79619929 + 900 = 8923^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 79620829 - 2¹⁹ = 79096541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79620839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39810414 + 39810415.

It is an arithmetic number, because the mean of its divisors is an integer number (39810415).

Almost surely, 2^79620829 is an apocalyptic number.

It is an amenable number.

79620829 is a deficient number, since it is larger than the sum of its proper divisors (1).

79620829 is an equidigital number, since it uses as much as digits as its factorization.

79620829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 79620829 is about 8923.0504313267. The cubic root of 79620829 is about 430.2051103673.

The spelling of 79620829 in words is "seventy-nine million, six hundred twenty thousand, eight hundred twenty-nine".