79131229 has 2 divisors, whose sum is σ = 79131230. Its totient is φ = 79131228.

The previous prime is 79131211. The next prime is 79131233. The reversal of 79131229 is 92213197.

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., 68923204 + 10208025 = 8302^2 + 3195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79131229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79131194 and 79131203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79131259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39565614 + 39565615.

It is an arithmetic number, because the mean of its divisors is an integer number (39565615).

Almost surely, 2^79131229 is an apocalyptic number.

It is an amenable number.

79131229 is a deficient number, since it is larger than the sum of its proper divisors (1).

79131229 is an equidigital number, since it uses as much as digits as its factorization.

79131229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The square root of 79131229 is about 8895.5735621712. The cubic root of 79131229 is about 429.3214989060.

The spelling of 79131229 in words is "seventy-nine million, one hundred thirty-one thousand, two hundred twenty-nine".