811490243 has 2 divisors, whose sum is σ = 811490244. Its totient is φ = 811490242.

The previous prime is 811490237. The next prime is 811490293. The reversal of 811490243 is 342094118.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811490243 - 2⁴ = 811490227 is a prime.

It is not a weakly prime, because it can be changed into another prime (811490233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405745121 + 405745122.

It is an arithmetic number, because the mean of its divisors is an integer number (405745122).

Almost surely, 2^811490243 is an apocalyptic number.

811490243 is a deficient number, since it is larger than the sum of its proper divisors (1).

811490243 is an equidigital number, since it uses as much as digits as its factorization.

811490243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 811490243 is about 28486.6678114517. The cubic root of 811490243 is about 932.7410721109.

The spelling of 811490243 in words is "eight hundred eleven million, four hundred ninety thousand, two hundred forty-three".