200461991 has 2 divisors, whose sum is σ = 200461992. Its totient is φ = 200461990.

The previous prime is 200461981. The next prime is 200462021. The reversal of 200461991 is 199164002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200461991 - 2¹⁴ = 200445607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200461981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100230995 + 100230996.

It is an arithmetic number, because the mean of its divisors is an integer number (100230996).

Almost surely, 2^200461991 is an apocalyptic number.

200461991 is a deficient number, since it is larger than the sum of its proper divisors (1).

200461991 is an equidigital number, since it uses as much as digits as its factorization.

200461991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 200461991 is about 14158.4600504433. The cubic root of 200461991 is about 585.2534913300.

The spelling of 200461991 in words is "two hundred million, four hundred sixty-one thousand, nine hundred ninety-one".