811490233 has 2 divisors, whose sum is σ = 811490234. Its totient is φ = 811490232.

The previous prime is 811490231. The next prime is 811490237. The reversal of 811490233 is 332094118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592094889 + 219395344 = 24333^2 + 14812^2 .

It is a cyclic number.

It is not a de Polignac number, because 811490233 - 2¹ = 811490231 is a prime.

Together with 811490231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 811490195 and 811490204.

It is not a weakly prime, because it can be changed into another prime (811490231) 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, 405745116 + 405745117.

It is an arithmetic number, because the mean of its divisors is an integer number (405745117).

Almost surely, 2^811490233 is an apocalyptic number.

It is an amenable number.

811490233 is a deficient number, since it is larger than the sum of its proper divisors (1).

811490233 is an equidigital number, since it uses as much as digits as its factorization.

811490233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 811490233 is about 28486.6676359310. The cubic root of 811490233 is about 932.7410682795.

The spelling of 811490233 in words is "eight hundred eleven million, four hundred ninety thousand, two hundred thirty-three".