1117807979 has 4 divisors (see below), whose sum is σ = 1117875000. Its totient is φ = 1117740960.

The previous prime is 1117807973. The next prime is 1117807991. The reversal of 1117807979 is 9797087111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1117807979 - 2⁴ = 1117807963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117807973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13364 + ... + 49134.

It is an arithmetic number, because the mean of its divisors is an integer number (279468750).

Almost surely, 2^1117807979 is an apocalyptic number.

1117807979 is a deficient number, since it is larger than the sum of its proper divisors (67021).

1117807979 is an equidigital number, since it uses as much as digits as its factorization.

1117807979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67020.

The product of its (nonzero) digits is 222264, while the sum is 50.

The square root of 1117807979 is about 33433.6354439657. The cubic root of 1117807979 is about 1037.8208745544.

The spelling of 1117807979 in words is "one billion, one hundred seventeen million, eight hundred seven thousand, nine hundred seventy-nine".