117979789 has 4 divisors (see below), whose sum is σ = 118450080. Its totient is φ = 117509500.

The previous prime is 117979787. The next prime is 117979843. The reversal of 117979789 is 987979711.

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 not a de Polignac number, because 117979789 - 2¹ = 117979787 is a prime.

It is a super-2 number, since 2×117979789² = 27838461224969042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117979781) 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, 234769 + ... + 235270.

It is an arithmetic number, because the mean of its divisors is an integer number (29612520).

Almost surely, 2^117979789 is an apocalyptic number.

It is an amenable number.

117979789 is a deficient number, since it is larger than the sum of its proper divisors (470291).

117979789 is an equidigital number, since it uses as much as digits as its factorization.

117979789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470290.

The product of its digits is 2000376, while the sum is 58.

The square root of 117979789 is about 10861.8501646819. The cubic root of 117979789 is about 490.4588080817.

The spelling of 117979789 in words is "one hundred seventeen million, nine hundred seventy-nine thousand, seven hundred eighty-nine".