814445293 has 2 divisors, whose sum is σ = 814445294. Its totient is φ = 814445292.

The previous prime is 814445239. The next prime is 814445297. The reversal of 814445293 is 392544418.

Together with previous prime (814445239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 775232649 + 39212644 = 27843^2 + 6262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814445293 is a prime.

It is a super-2 number, since 2×814445293² = 1326642270579711698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814445297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407222646 + 407222647.

It is an arithmetic number, because the mean of its divisors is an integer number (407222647).

Almost surely, 2^814445293 is an apocalyptic number.

It is an amenable number.

814445293 is a deficient number, since it is larger than the sum of its proper divisors (1).

814445293 is an equidigital number, since it uses as much as digits as its factorization.

814445293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 814445293 is about 28538.4879242051. The cubic root of 814445293 is about 933.8718959612.

The spelling of 814445293 in words is "eight hundred fourteen million, four hundred forty-five thousand, two hundred ninety-three".