812063681 has 8 divisors (see below), whose sum is σ = 954033024. Its totient is φ = 681451920.

The previous prime is 812063663. The next prime is 812063687. The reversal of 812063681 is 186360218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812063681 is a prime.

It is a super-2 number, since 2×812063681² = 1318894843998539522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812063687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839241 + ... + 2839526.

It is an arithmetic number, because the mean of its divisors is an integer number (119254128).

Almost surely, 2^812063681 is an apocalyptic number.

It is an amenable number.

812063681 is a deficient number, since it is larger than the sum of its proper divisors (141969343).

812063681 is a wasteful number, since it uses less digits than its factorization.

812063681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678791.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 812063681 is about 28496.7310581407. The cubic root of 812063681 is about 932.9607269335.

The spelling of 812063681 in words is "eight hundred twelve million, sixty-three thousand, six hundred eighty-one".