1011999892 has 24 divisors (see below), whose sum is σ = 1859427360. Its totient is φ = 481256160.

The previous prime is 1011999887. The next prime is 1011999893. The reversal of 1011999892 is 2989991101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011999893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57334 + ... + 72877.

It is an arithmetic number, because the mean of its divisors is an integer number (77476140).

Almost surely, 2^1011999892 is an apocalyptic number.

It is an amenable number.

1011999892 is a deficient number, since it is larger than the sum of its proper divisors (847427468).

1011999892 is a wasteful number, since it uses less digits than its factorization.

1011999892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130311 (or 130309 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 49.

The square root of 1011999892 is about 31811.9457436982. The cubic root of 1011999892 is about 1003.9840701059.

It can be divided in two parts, 10119 and 99892, that added together give a palindrome (110011).

The spelling of 1011999892 in words is "one billion, eleven million, nine hundred ninety-nine thousand, eight hundred ninety-two".