1121979599 has 8 divisors (see below), whose sum is σ = 1218980112. Its totient is φ = 1026506880.

The previous prime is 1121979581. The next prime is 1121979611. The reversal of 1121979599 is 9959791211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121979599 - 2⁸ = 1121979343 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 1121979599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121979539) 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 7 ways as a sum of consecutive naturals, for example, 380417 + ... + 383354.

It is an arithmetic number, because the mean of its divisors is an integer number (152372514).

Almost surely, 2^1121979599 is an apocalyptic number.

1121979599 is a deficient number, since it is larger than the sum of its proper divisors (97000513).

1121979599 is a wasteful number, since it uses less digits than its factorization.

1121979599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763897.

The product of its digits is 459270, while the sum is 53.

The square root of 1121979599 is about 33495.9639210458. The cubic root of 1121979599 is about 1039.1103088224.

The spelling of 1121979599 in words is "one billion, one hundred twenty-one million, nine hundred seventy-nine thousand, five hundred ninety-nine".