79381129 has 2 divisors, whose sum is σ = 79381130. Its totient is φ = 79381128.

The previous prime is 79381079. The next prime is 79381151. The reversal of 79381129 is 92118397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 3429904 = 8715^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 79381129 - 2⁹ = 79380617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79381091 and 79381100.

It is not a weakly prime, because it can be changed into another prime (79381199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39690564 + 39690565.

It is an arithmetic number, because the mean of its divisors is an integer number (39690565).

Almost surely, 2^79381129 is an apocalyptic number.

It is an amenable number.

79381129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79381129 is an equidigital number, since it uses as much as digits as its factorization.

79381129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 79381129 is about 8909.6088017376. The cubic root of 79381129 is about 429.7729628945.

The spelling of 79381129 in words is "seventy-nine million, three hundred eighty-one thousand, one hundred twenty-nine".