201890369 has 2 divisors, whose sum is σ = 201890370. Its totient is φ = 201890368.

The previous prime is 201890347. The next prime is 201890387. The reversal of 201890369 is 963098102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195580225 + 6310144 = 13985^2 + 2512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201890369 is a prime.

It is a super-2 number, since 2×201890369² = 81519442189912322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201890329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100945184 + 100945185.

It is an arithmetic number, because the mean of its divisors is an integer number (100945185).

Almost surely, 2^201890369 is an apocalyptic number.

It is an amenable number.

201890369 is a deficient number, since it is larger than the sum of its proper divisors (1).

201890369 is an equidigital number, since it uses as much as digits as its factorization.

201890369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 201890369 is about 14208.8130749898. The cubic root of 201890369 is about 586.6402637839.

The spelling of 201890369 in words is "two hundred one million, eight hundred ninety thousand, three hundred sixty-nine".