79945559 has 8 divisors (see below), whose sum is σ = 86868480. Its totient is φ = 73294200.

The previous prime is 79945529. The next prime is 79945573. The reversal of 79945559 is 95554997.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79945559 - 2¹⁶ = 79880023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79945559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79945529) 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 7 ways as a sum of consecutive naturals, for example, 67277 + ... + 68454.

It is an arithmetic number, because the mean of its divisors is an integer number (10858560).

Almost surely, 2^79945559 is an apocalyptic number.

79945559 is a deficient number, since it is larger than the sum of its proper divisors (6922921).

79945559 is a wasteful number, since it uses less digits than its factorization.

79945559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135781.

The product of its digits is 2551500, while the sum is 53.

The square root of 79945559 is about 8941.2280476454. The cubic root of 79945559 is about 430.7891745108.

The spelling of 79945559 in words is "seventy-nine million, nine hundred forty-five thousand, five hundred fifty-nine".