812355293 has 2 divisors, whose sum is σ = 812355294. Its totient is φ = 812355292.

The previous prime is 812355289. The next prime is 812355343. The reversal of 812355293 is 392553218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 756360004 + 55995289 = 27502^2 + 7483^2 .

It is a cyclic number.

It is not a de Polignac number, because 812355293 - 2² = 812355289 is a prime.

It is a super-2 number, since 2×812355293² = 1319842244130231698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812355223) 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, 406177646 + 406177647.

It is an arithmetic number, because the mean of its divisors is an integer number (406177647).

Almost surely, 2^812355293 is an apocalyptic number.

It is an amenable number.

812355293 is a deficient number, since it is larger than the sum of its proper divisors (1).

812355293 is an equidigital number, since it uses as much as digits as its factorization.

812355293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 812355293 is about 28501.8471857527. The cubic root of 812355293 is about 933.0723889417.

The spelling of 812355293 in words is "eight hundred twelve million, three hundred fifty-five thousand, two hundred ninety-three".