812423453 has 2 divisors, whose sum is σ = 812423454. Its totient is φ = 812423452.

The previous prime is 812423449. The next prime is 812423461. The reversal of 812423453 is 354324218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804459769 + 7963684 = 28363^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 812423453 - 2² = 812423449 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812423473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406211726 + 406211727.

It is an arithmetic number, because the mean of its divisors is an integer number (406211727).

Almost surely, 2^812423453 is an apocalyptic number.

It is an amenable number.

812423453 is a deficient number, since it is larger than the sum of its proper divisors (1).

812423453 is an equidigital number, since it uses as much as digits as its factorization.

812423453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

The square root of 812423453 is about 28503.0428726478. The cubic root of 812423453 is about 933.0984844346.

The spelling of 812423453 in words is "eight hundred twelve million, four hundred twenty-three thousand, four hundred fifty-three".