79963109 has 4 divisors (see below), whose sum is σ = 80051040. Its totient is φ = 79875180.

The previous prime is 79963099. The next prime is 79963129. The reversal of 79963109 is 90136997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79963109 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 79963109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79963129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42587 + ... + 44424.

It is an arithmetic number, because the mean of its divisors is an integer number (20012760).

Almost surely, 2^79963109 is an apocalyptic number.

It is an amenable number.

79963109 is a deficient number, since it is larger than the sum of its proper divisors (87931).

79963109 is an equidigital number, since it uses as much as digits as its factorization.

79963109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87930.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 79963109 is about 8942.2094026029. The cubic root of 79963109 is about 430.8206951145.

The spelling of 79963109 in words is "seventy-nine million, nine hundred sixty-three thousand, one hundred nine".