812489713 has 4 divisors (see below), whose sum is σ = 928559680. Its totient is φ = 696419748.

The previous prime is 812489701. The next prime is 812489729. The reversal of 812489713 is 317984218.

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 812489713 - 2⁵ = 812489681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812489713.

It is not an unprimeable number, because it can be changed into a prime (812483713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58034973 + ... + 58034986.

It is an arithmetic number, because the mean of its divisors is an integer number (232139920).

Almost surely, 2^812489713 is an apocalyptic number.

It is an amenable number.

812489713 is a deficient number, since it is larger than the sum of its proper divisors (116069967).

812489713 is a wasteful number, since it uses less digits than its factorization.

812489713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116069966.

The product of its digits is 96768, while the sum is 43.

The square root of 812489713 is about 28504.2051809904. The cubic root of 812489713 is about 933.1238511013.

The spelling of 812489713 in words is "eight hundred twelve million, four hundred eighty-nine thousand, seven hundred thirteen".