1992329081 has 2 divisors, whose sum is σ = 1992329082. Its totient is φ = 1992329080.

The previous prime is 1992329071. The next prime is 1992329149. The reversal of 1992329081 is 1809232991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1943399056 + 48930025 = 44084^2 + 6995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1992329081 is a prime.

It is a super-2 number, since 2×1992329081² = 7938750333996609122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1992329011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996164540 + 996164541.

It is an arithmetic number, because the mean of its divisors is an integer number (996164541).

Almost surely, 2^1992329081 is an apocalyptic number.

It is an amenable number.

1992329081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992329081 is an equidigital number, since it uses as much as digits as its factorization.

1992329081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1992329081 is about 44635.5136746515. The cubic root of 1992329081 is about 1258.3081940662.

The spelling of 1992329081 in words is "one billion, nine hundred ninety-two million, three hundred twenty-nine thousand, eighty-one".