812634193 has 4 divisors (see below), whose sum is σ = 928724800. Its totient is φ = 696543588.

The previous prime is 812634181. The next prime is 812634197. The reversal of 812634193 is 391436218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 812634193 - 2⁹ = 812633681 is a prime.

It is a super-2 number, since 2×812634193² = 1320748663265522498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812634197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58045293 + ... + 58045306.

It is an arithmetic number, because the mean of its divisors is an integer number (232181200).

Almost surely, 2^812634193 is an apocalyptic number.

It is an amenable number.

812634193 is a deficient number, since it is larger than the sum of its proper divisors (116090607).

812634193 is a wasteful number, since it uses less digits than its factorization.

812634193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116090606.

The product of its digits is 31104, while the sum is 37.

The square root of 812634193 is about 28506.7394312292. The cubic root of 812634193 is about 933.1791583630.

The spelling of 812634193 in words is "eight hundred twelve million, six hundred thirty-four thousand, one hundred ninety-three".