812868897 has 8 divisors (see below), whose sum is σ = 1104274944. Its totient is φ = 531687728.

The previous prime is 812868863. The next prime is 812868899. The reversal of 812868897 is 798868218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812868897 - 2²⁶ = 745760033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812868899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2556033 + ... + 2556350.

It is an arithmetic number, because the mean of its divisors is an integer number (138034368).

Almost surely, 2^812868897 is an apocalyptic number.

It is an amenable number.

812868897 is a deficient number, since it is larger than the sum of its proper divisors (291406047).

812868897 is a wasteful number, since it uses less digits than its factorization.

812868897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112439.

The product of its digits is 3096576, while the sum is 57.

The square root of 812868897 is about 28510.8557745993. The cubic root of 812868897 is about 933.2689895977.

The spelling of 812868897 in words is "eight hundred twelve million, eight hundred sixty-eight thousand, eight hundred ninety-seven".