201985633 has 2 divisors, whose sum is σ = 201985634. Its totient is φ = 201985632.

The previous prime is 201985621. The next prime is 201985643. The reversal of 201985633 is 336589102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186240609 + 15745024 = 13647^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 201985633 - 2⁵ = 201985601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201985592 and 201985601.

It is not a weakly prime, because it can be changed into another prime (201985613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100992816 + 100992817.

It is an arithmetic number, because the mean of its divisors is an integer number (100992817).

Almost surely, 2^201985633 is an apocalyptic number.

It is an amenable number.

201985633 is a deficient number, since it is larger than the sum of its proper divisors (1).

201985633 is an equidigital number, since it uses as much as digits as its factorization.

201985633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 201985633 is about 14212.1649652683. The cubic root of 201985633 is about 586.7325199766.

The spelling of 201985633 in words is "two hundred one million, nine hundred eighty-five thousand, six hundred thirty-three".