201974081 has 2 divisors, whose sum is σ = 201974082. Its totient is φ = 201974080.

The previous prime is 201974033. The next prime is 201974173. The reversal of 201974081 is 180479102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201895681 + 78400 = 14209^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 201974081 - 2²⁶ = 134865217 is a prime.

It is a super-2 number, since 2×201974081² = 81587058791589122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201974581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100987040 + 100987041.

It is an arithmetic number, because the mean of its divisors is an integer number (100987041).

Almost surely, 2^201974081 is an apocalyptic number.

It is an amenable number.

201974081 is a deficient number, since it is larger than the sum of its proper divisors (1).

201974081 is an equidigital number, since it uses as much as digits as its factorization.

201974081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 201974081 is about 14211.7585470624. The cubic root of 201974081 is about 586.7213342581.

The spelling of 201974081 in words is "two hundred one million, nine hundred seventy-four thousand, eighty-one".