1992133439 has 4 divisors (see below), whose sum is σ = 2056395840. Its totient is φ = 1927871040.

The previous prime is 1992133433. The next prime is 1992133447. The reversal of 1992133439 is 9343312991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1992133439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1992133439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992133433) 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, 32131154 + ... + 32131215.

It is an arithmetic number, because the mean of its divisors is an integer number (514098960).

Almost surely, 2^1992133439 is an apocalyptic number.

1992133439 is a deficient number, since it is larger than the sum of its proper divisors (64262401).

1992133439 is an equidigital number, since it uses as much as digits as its factorization.

1992133439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64262400.

The product of its digits is 157464, while the sum is 44.

The square root of 1992133439 is about 44633.3220699513. The cubic root of 1992133439 is about 1258.2670050892.

The spelling of 1992133439 in words is "one billion, nine hundred ninety-two million, one hundred thirty-three thousand, four hundred thirty-nine".