812403693 has 12 divisors (see below), whose sum is σ = 1176187740. Its totient is φ = 540349056.

The previous prime is 812403679. The next prime is 812403703. The reversal of 812403693 is 396304218.

It can be written as a sum of positive squares in 2 ways, for example, as 476854569 + 335549124 = 21837^2 + 18318^2 .

It is not a de Polignac number, because 812403693 - 2⁵ = 812403661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812403623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100338 + ... + 108131.

It is an arithmetic number, because the mean of its divisors is an integer number (98015645).

Almost surely, 2^812403693 is an apocalyptic number.

It is an amenable number.

812403693 is a deficient number, since it is larger than the sum of its proper divisors (363784047).

812403693 is a wasteful number, since it uses less digits than its factorization.

812403693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208908 (or 208905 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 812403693 is about 28502.6962408822. The cubic root of 812403693 is about 933.0909193422.

The spelling of 812403693 in words is "eight hundred twelve million, four hundred three thousand, six hundred ninety-three".