1011993964 has 12 divisors (see below), whose sum is σ = 1771949088. Its totient is φ = 505722800.

The previous prime is 1011993943. The next prime is 1011994007. The reversal of 1011993964 is 4693991101.

It is a self number, because there is not a number n which added to its sum of digits gives 1011993964.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60127 + ... + 75094.

It is an arithmetic number, because the mean of its divisors is an integer number (147662424).

Almost surely, 2^1011993964 is an apocalyptic number.

It is an amenable number.

1011993964 is a deficient number, since it is larger than the sum of its proper divisors (759955124).

1011993964 is a wasteful number, since it uses less digits than its factorization.

1011993964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137096 (or 137094 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1011993964 is about 31811.8525710151. The cubic root of 1011993964 is about 1003.9821097535.

The spelling of 1011993964 in words is "one billion, eleven million, nine hundred ninety-three thousand, nine hundred sixty-four".