1992085921 has 8 divisors (see below), whose sum is σ = 2277335744. Its totient is φ = 1707002640.

The previous prime is 1992085919. The next prime is 1992085937. The reversal of 1992085921 is 1295802991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1992085921 - 2¹ = 1992085919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992085981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14850 + ... + 64843.

It is an arithmetic number, because the mean of its divisors is an integer number (284666968).

Almost surely, 2^1992085921 is an apocalyptic number.

It is an amenable number.

1992085921 is a deficient number, since it is larger than the sum of its proper divisors (285249823).

1992085921 is an equidigital number, since it uses as much as digits as its factorization.

1992085921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83271.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 1992085921 is about 44632.7897514820. The cubic root of 1992085921 is about 1258.2570006043.

It can be divided in two parts, 1992085 and 921, that added together give a triangular number (1993006 = T₁₉₉₆).

The spelling of 1992085921 in words is "one billion, nine hundred ninety-two million, eighty-five thousand, nine hundred twenty-one".