1992967021 has 2 divisors, whose sum is σ = 1992967022. Its totient is φ = 1992967020.

The previous prime is 1992966979. The next prime is 1992967027. The reversal of 1992967021 is 1207692991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1016716996 + 976250025 = 31886^2 + 31245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1992967021 - 2⁹ = 1992966509 is a prime.

It is a super-2 number, since 2×1992967021² = 7943835093587228882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1992967027) 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 as a sum of consecutive naturals, namely, 996483510 + 996483511.

It is an arithmetic number, because the mean of its divisors is an integer number (996483511).

Almost surely, 2^1992967021 is an apocalyptic number.

It is an amenable number.

1992967021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992967021 is an equidigital number, since it uses as much as digits as its factorization.

1992967021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 1992967021 is about 44642.6592061898. The cubic root of 1992967021 is about 1258.4424823682.

The spelling of 1992967021 in words is "one billion, nine hundred ninety-two million, nine hundred sixty-seven thousand, twenty-one".