1091979308 has 18 divisors (see below), whose sum is σ = 2222958276. Its totient is φ = 467991048.

The previous prime is 1091979293. The next prime is 1091979347. The reversal of 1091979308 is 8039791901.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2785466 + ... + 2785857.

It is an arithmetic number, because the mean of its divisors is an integer number (123497682).

Almost surely, 2^1091979308 is an apocalyptic number.

It is an amenable number.

1091979308 is an abundant number, since it is smaller than the sum of its proper divisors (1130978968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091979308 is a wasteful number, since it uses less digits than its factorization.

1091979308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571341 (or 5571332 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 1091979308 is about 33045.1101980308. The cubic root of 1091979308 is about 1029.7650225910.

The spelling of 1091979308 in words is "one billion, ninety-one million, nine hundred seventy-nine thousand, three hundred eight".