201269689 has 2 divisors, whose sum is σ = 201269690. Its totient is φ = 201269688.

The previous prime is 201269671. The next prime is 201269693. The reversal of 201269689 is 986962102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188787600 + 12482089 = 13740^2 + 3533^2 .

It is a cyclic number.

It is not a de Polignac number, because 201269689 - 2⁹ = 201269177 is a prime.

It is not a weakly prime, because it can be changed into another prime (201269609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100634844 + 100634845.

It is an arithmetic number, because the mean of its divisors is an integer number (100634845).

Almost surely, 2^201269689 is an apocalyptic number.

It is an amenable number.

201269689 is a deficient number, since it is larger than the sum of its proper divisors (1).

201269689 is an equidigital number, since it uses as much as digits as its factorization.

201269689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 201269689 is about 14186.9548882063. The cubic root of 201269689 is about 586.0384690933.

The spelling of 201269689 in words is "two hundred one million, two hundred sixty-nine thousand, six hundred eighty-nine".