1831991068 has 12 divisors (see below), whose sum is σ = 3206290360. Its totient is φ = 915908112.

The previous prime is 1831991053. The next prime is 1831991089. The reversal of 1831991068 is 8601991381.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 56530 + ... + 82822.

Almost surely, 2^1831991068 is an apocalyptic number.

It is an amenable number.

1831991068 is a deficient number, since it is larger than the sum of its proper divisors (1374299292).

1831991068 is a wasteful number, since it uses less digits than its factorization.

1831991068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43716 (or 43714 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 1831991068 is about 42801.7647767005. The cubic root of 1831991068 is about 1223.6046459407.

The spelling of 1831991068 in words is "one billion, eight hundred thirty-one million, nine hundred ninety-one thousand, sixty-eight".