814941981 has 36 divisors (see below), whose sum is σ = 1413519744. Its totient is φ = 450651600.

The previous prime is 814941949. The next prime is 814942001. The reversal of 814941981 is 189149418.

814941981 is a `hidden beast` number, since 81 + 494 + 1 + 9 + 81 = 666.

It is not a de Polignac number, because 814941981 - 2⁵ = 814941949 is a prime.

It is a super-2 number, since 2×814941981² = 1328260864792408722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814941181) 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 35 ways as a sum of consecutive naturals, for example, 16135 + ... + 43476.

Almost surely, 2^814941981 is an apocalyptic number.

It is an amenable number.

814941981 is a deficient number, since it is larger than the sum of its proper divisors (598577763).

814941981 is a wasteful number, since it uses less digits than its factorization.

814941981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59662 (or 59652 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 814941981 is about 28547.1886706905. The cubic root of 814941981 is about 934.0616974163.

The spelling of 814941981 in words is "eight hundred fourteen million, nine hundred forty-one thousand, nine hundred eighty-one".