79765509 has 8 divisors (see below), whose sum is σ = 106819360. Its totient is φ = 52944336.

The previous prime is 79765501. The next prime is 79765519. The reversal of 79765509 is 90556797.

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

It is not a de Polignac number, because 79765509 - 2³ = 79765501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79765501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57367 + ... + 58740.

It is an arithmetic number, because the mean of its divisors is an integer number (13352420).

Almost surely, 2^79765509 is an apocalyptic number.

It is an amenable number.

79765509 is a deficient number, since it is larger than the sum of its proper divisors (27053851).

79765509 is a wasteful number, since it uses less digits than its factorization.

79765509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116339.

The product of its (nonzero) digits is 595350, while the sum is 48.

The square root of 79765509 is about 8931.1538448288. The cubic root of 79765509 is about 430.4655297152.

The spelling of 79765509 in words is "seventy-nine million, seven hundred sixty-five thousand, five hundred nine".