79412689 has 4 divisors (see below), whose sum is σ = 79461940. Its totient is φ = 79363440.

The previous prime is 79412659. The next prime is 79412699. The reversal of 79412689 is 98621497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50339025 + 29073664 = 7095^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 79412689 - 2¹³ = 79404497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79412659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22122 + ... + 25459.

It is an arithmetic number, because the mean of its divisors is an integer number (19865485).

Almost surely, 2^79412689 is an apocalyptic number.

It is an amenable number.

79412689 is a deficient number, since it is larger than the sum of its proper divisors (49251).

79412689 is a wasteful number, since it uses less digits than its factorization.

79412689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49250.

The product of its digits is 217728, while the sum is 46.

The square root of 79412689 is about 8911.3797472670. The cubic root of 79412689 is about 429.8299110959.

The spelling of 79412689 in words is "seventy-nine million, four hundred twelve thousand, six hundred eighty-nine".