79412209 has 2 divisors, whose sum is σ = 79412210. Its totient is φ = 79412208.

The previous prime is 79412197. The next prime is 79412231. The reversal of 79412209 is 90221497.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71031184 + 8381025 = 8428^2 + 2895^2 .

It is an emirp because it is prime and its reverse (90221497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79412209 - 2¹⁵ = 79379441 is a prime.

It is not a weakly prime, because it can be changed into another prime (79412239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39706104 + 39706105.

It is an arithmetic number, because the mean of its divisors is an integer number (39706105).

Almost surely, 2^79412209 is an apocalyptic number.

It is an amenable number.

79412209 is a deficient number, since it is larger than the sum of its proper divisors (1).

79412209 is an equidigital number, since it uses as much as digits as its factorization.

79412209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 79412209 is about 8911.3528153698. The cubic root of 79412209 is about 429.8290450766.

The spelling of 79412209 in words is "seventy-nine million, four hundred twelve thousand, two hundred nine".