1113209979 has 48 divisors (see below), whose sum is σ = 1795691520. Its totient is φ = 610908480.

The previous prime is 1113209971. The next prime is 1113209989. The reversal of 1113209979 is 9799023111.

1113209979 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1113209979 - 2³ = 1113209971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1113209979.

It is not an unprimeable number, because it can be changed into a prime (1113209971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 950064 + ... + 951234.

It is an arithmetic number, because the mean of its divisors is an integer number (37410240).

Almost surely, 2^1113209979 is an apocalyptic number.

1113209979 is a deficient number, since it is larger than the sum of its proper divisors (682481541).

1113209979 is a wasteful number, since it uses less digits than its factorization.

1113209979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 1113209979 is about 33364.8014979859. The cubic root of 1113209979 is about 1036.3959254909.

The spelling of 1113209979 in words is "one billion, one hundred thirteen million, two hundred nine thousand, nine hundred seventy-nine".