812345773 has 2 divisors, whose sum is σ = 812345774. Its totient is φ = 812345772.

The previous prime is 812345753. The next prime is 812345801. The reversal of 812345773 is 377543218.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626350729 + 185995044 = 25027^2 + 13638^2 .

It is a cyclic number.

It is not a de Polignac number, because 812345773 - 2²⁵ = 778791341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812345753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406172886 + 406172887.

It is an arithmetic number, because the mean of its divisors is an integer number (406172887).

Almost surely, 2^812345773 is an apocalyptic number.

It is an amenable number.

812345773 is a deficient number, since it is larger than the sum of its proper divisors (1).

812345773 is an equidigital number, since it uses as much as digits as its factorization.

812345773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 812345773 is about 28501.6801785439. The cubic root of 812345773 is about 933.0687440325.

The spelling of 812345773 in words is "eight hundred twelve million, three hundred forty-five thousand, seven hundred seventy-three".