731818201 has 2 divisors, whose sum is σ = 731818202. Its totient is φ = 731818200.

The previous prime is 731818169. The next prime is 731818207. The reversal of 731818201 is 102818137.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726248601 + 5569600 = 26949^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 731818201 - 2⁵ = 731818169 is a prime.

It is not a weakly prime, because it can be changed into another prime (731818207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365909100 + 365909101.

It is an arithmetic number, because the mean of its divisors is an integer number (365909101).

Almost surely, 2^731818201 is an apocalyptic number.

It is an amenable number.

731818201 is a deficient number, since it is larger than the sum of its proper divisors (1).

731818201 is an equidigital number, since it uses as much as digits as its factorization.

731818201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 731818201 is about 27052.1385661097. The cubic root of 731818201 is about 901.1582622236.

The spelling of 731818201 in words is "seven hundred thirty-one million, eight hundred eighteen thousand, two hundred one".