811490293 has 2 divisors, whose sum is σ = 811490294. Its totient is φ = 811490292.

The previous prime is 811490243. The next prime is 811490299. The reversal of 811490293 is 392094118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554272849 + 257217444 = 23543^2 + 16038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811490293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811490299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405745146 + 405745147.

It is an arithmetic number, because the mean of its divisors is an integer number (405745147).

Almost surely, 2^811490293 is an apocalyptic number.

It is an amenable number.

811490293 is a deficient number, since it is larger than the sum of its proper divisors (1).

811490293 is an equidigital number, since it uses as much as digits as its factorization.

811490293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 811490293 is about 28486.6686890552. The cubic root of 811490293 is about 932.7410912678.

The spelling of 811490293 in words is "eight hundred eleven million, four hundred ninety thousand, two hundred ninety-three".