461992021 has 2 divisors, whose sum is σ = 461992022. Its totient is φ = 461992020.

The previous prime is 461991967. The next prime is 461992033. The reversal of 461992021 is 120299164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246929796 + 215062225 = 15714^2 + 14665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461992021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461992121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230996010 + 230996011.

It is an arithmetic number, because the mean of its divisors is an integer number (230996011).

Almost surely, 2^461992021 is an apocalyptic number.

It is an amenable number.

461992021 is a deficient number, since it is larger than the sum of its proper divisors (1).

461992021 is an equidigital number, since it uses as much as digits as its factorization.

461992021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 461992021 is about 21493.9996510654. Note that the first 3 decimals coincide. The cubic root of 461992021 is about 773.0569548241.

The spelling of 461992021 in words is "four hundred sixty-one million, nine hundred ninety-two thousand, twenty-one".