1992191212 has 24 divisors (see below), whose sum is σ = 3827512080. Its totient is φ = 899770560.

The previous prime is 1992191197. The next prime is 1992191213. The reversal of 1992191212 is 2121912991.

It is not an unprimeable number, because it can be changed into a prime (1992191213) 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, 137287 + ... + 151102.

It is an arithmetic number, because the mean of its divisors is an integer number (159479670).

Almost surely, 2^1992191212 is an apocalyptic number.

It is an amenable number.

1992191212 is a deficient number, since it is larger than the sum of its proper divisors (1835320868).

1992191212 is a wasteful number, since it uses less digits than its factorization.

1992191212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288561 (or 288559 counting only the distinct ones).

The product of its digits is 5832, while the sum is 37.

The square root of 1992191212 is about 44633.9692610908. The cubic root of 1992191212 is about 1258.2791684573.

The spelling of 1992191212 in words is "one billion, nine hundred ninety-two million, one hundred ninety-one thousand, two hundred twelve".