79852309 has 2 divisors, whose sum is σ = 79852310. Its totient is φ = 79852308.

The previous prime is 79852301. The next prime is 79852321. The reversal of 79852309 is 90325897.

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., 50367409 + 29484900 = 7097^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 79852309 - 2³ = 79852301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79852301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39926154 + 39926155.

It is an arithmetic number, because the mean of its divisors is an integer number (39926155).

Almost surely, 2^79852309 is an apocalyptic number.

It is an amenable number.

79852309 is a deficient number, since it is larger than the sum of its proper divisors (1).

79852309 is an equidigital number, since it uses as much as digits as its factorization.

79852309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 79852309 is about 8936.0119180762. The cubic root of 79852309 is about 430.6216158207.

The spelling of 79852309 in words is "seventy-nine million, eight hundred fifty-two thousand, three hundred nine".