79663009 has 2 divisors, whose sum is σ = 79663010. Its totient is φ = 79663008.

The previous prime is 79662997. The next prime is 79663013. The reversal of 79663009 is 90036697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 950625 = 8872^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 79663009 - 2⁷ = 79662881 is a prime.

It is not a weakly prime, because it can be changed into another prime (79663019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39831504 + 39831505.

It is an arithmetic number, because the mean of its divisors is an integer number (39831505).

Almost surely, 2^79663009 is an apocalyptic number.

It is an amenable number.

79663009 is a deficient number, since it is larger than the sum of its proper divisors (1).

79663009 is an equidigital number, since it uses as much as digits as its factorization.

79663009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 79663009 is about 8925.4136598815. The cubic root of 79663009 is about 430.2810655680.

The spelling of 79663009 in words is "seventy-nine million, six hundred sixty-three thousand, nine".