201936689 has 2 divisors, whose sum is σ = 201936690. Its totient is φ = 201936688.

The previous prime is 201936667. The next prime is 201936733. The reversal of 201936689 is 986639102.

It is an a-pointer prime, because the next prime (201936733) can be obtained adding 201936689 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151413025 + 50523664 = 12305^2 + 7108^2 .

It is a cyclic number.

It is not a de Polignac number, because 201936689 - 2⁸ = 201936433 is a prime.

It is not a weakly prime, because it can be changed into another prime (201936629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100968344 + 100968345.

It is an arithmetic number, because the mean of its divisors is an integer number (100968345).

Almost surely, 2^201936689 is an apocalyptic number.

It is an amenable number.

201936689 is a deficient number, since it is larger than the sum of its proper divisors (1).

201936689 is an equidigital number, since it uses as much as digits as its factorization.

201936689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 201936689 is about 14210.4429557984. The cubic root of 201936689 is about 586.6851249286.

The spelling of 201936689 in words is "two hundred one million, nine hundred thirty-six thousand, six hundred eighty-nine".