1992291839 has 4 divisors (see below), whose sum is σ = 1992420456. Its totient is φ = 1992163224.

The previous prime is 1992291731. The next prime is 1992291841. The reversal of 1992291839 is 9381922991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1992291839 - 2¹² = 1992287743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992291859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37289 + ... + 73314.

It is an arithmetic number, because the mean of its divisors is an integer number (498105114).

Almost surely, 2^1992291839 is an apocalyptic number.

1992291839 is a deficient number, since it is larger than the sum of its proper divisors (128617).

1992291839 is a wasteful number, since it uses less digits than its factorization.

1992291839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128616.

The product of its digits is 629856, while the sum is 53.

The square root of 1992291839 is about 44635.0964936786. The cubic root of 1992291839 is about 1258.3003536269.

The spelling of 1992291839 in words is "one billion, nine hundred ninety-two million, two hundred ninety-one thousand, eight hundred thirty-nine".