201690659 has 2 divisors, whose sum is σ = 201690660. Its totient is φ = 201690658.

The previous prime is 201690631. The next prime is 201690661. The reversal of 201690659 is 956096102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201690659 is a prime.

Together with 201690661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201693659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100845329 + 100845330.

It is an arithmetic number, because the mean of its divisors is an integer number (100845330).

Almost surely, 2^201690659 is an apocalyptic number.

201690659 is a deficient number, since it is larger than the sum of its proper divisors (1).

201690659 is an equidigital number, since it uses as much as digits as its factorization.

201690659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 201690659 is about 14201.7836555835. The cubic root of 201690659 is about 586.4467650717.

The spelling of 201690659 in words is "two hundred one million, six hundred ninety thousand, six hundred fifty-nine".