79426609 has 2 divisors, whose sum is σ = 79426610. Its totient is φ = 79426608.

The previous prime is 79426597. The next prime is 79426637. The reversal of 79426609 is 90662497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 4223025 = 8672^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 79426609 - 2⁷ = 79426481 is a prime.

It is not a weakly prime, because it can be changed into another prime (79426649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39713304 + 39713305.

It is an arithmetic number, because the mean of its divisors is an integer number (39713305).

Almost surely, 2^79426609 is an apocalyptic number.

It is an amenable number.

79426609 is a deficient number, since it is larger than the sum of its proper divisors (1).

79426609 is an equidigital number, since it uses as much as digits as its factorization.

79426609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 79426609 is about 8912.1607368808. The cubic root of 79426609 is about 429.8550241389.

The spelling of 79426609 in words is "seventy-nine million, four hundred twenty-six thousand, six hundred nine".