814976681 has 2 divisors, whose sum is σ = 814976682. Its totient is φ = 814976680.

The previous prime is 814976627. The next prime is 814976699. The reversal of 814976681 is 186679418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788711056 + 26265625 = 28084^2 + 5125^2 .

It is a cyclic number.

It is not a de Polignac number, because 814976681 - 2¹⁰ = 814975657 is a prime.

It is a super-2 number, since 2×814976681² = 1328373981147551522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (814976611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407488340 + 407488341.

It is an arithmetic number, because the mean of its divisors is an integer number (407488341).

Almost surely, 2^814976681 is an apocalyptic number.

It is an amenable number.

814976681 is a deficient number, since it is larger than the sum of its proper divisors (1).

814976681 is an equidigital number, since it uses as much as digits as its factorization.

814976681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 814976681 is about 28547.7964298473. The cubic root of 814976681 is about 934.0749545894.

The spelling of 814976681 in words is "eight hundred fourteen million, nine hundred seventy-six thousand, six hundred eighty-one".