1992761 has 2 divisors, whose sum is σ = 1992762. Its totient is φ = 1992760.

The previous prime is 1992733. The next prime is 1992763. The reversal of 1992761 is 1672991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 32761 = 1400^2 + 181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1992761 is a prime.

It is a Sophie Germain prime.

Together with 1992763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1992763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996380 + 996381.

It is an arithmetic number, because the mean of its divisors is an integer number (996381).

2^1992761 is an apocalyptic number.

It is an amenable number.

1992761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992761 is an equidigital number, since it uses as much as digits as its factorization.

1992761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 1992761 is about 1411.6518692652. The cubic root of 1992761 is about 125.8399117457.

The spelling of 1992761 in words is "one million, nine hundred ninety-two thousand, seven hundred sixty-one".