812541293 has 2 divisors, whose sum is σ = 812541294. Its totient is φ = 812541292.

The previous prime is 812541283. The next prime is 812541337. The reversal of 812541293 is 392145218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479916649 + 332624644 = 21907^2 + 18238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812541293 is a prime.

It is a super-2 number, since 2×812541293² = 1320446705660223698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812541203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406270646 + 406270647.

It is an arithmetic number, because the mean of its divisors is an integer number (406270647).

Almost surely, 2^812541293 is an apocalyptic number.

It is an amenable number.

812541293 is a deficient number, since it is larger than the sum of its proper divisors (1).

812541293 is an equidigital number, since it uses as much as digits as its factorization.

812541293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 812541293 is about 28505.1099454115. The cubic root of 812541293 is about 933.1435967912.

The spelling of 812541293 in words is "eight hundred twelve million, five hundred forty-one thousand, two hundred ninety-three".