81364914 has 12 divisors (see below), whose sum is σ = 176290686. Its totient is φ = 27121632.

The previous prime is 81364891. The next prime is 81364919. The reversal of 81364914 is 41946318.

81364914 is a `hidden beast` number, since 8 + 1 + 3 + 649 + 1 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80192025 + 1172889 = 8955^2 + 1083^2 .

It is not an unprimeable number, because it can be changed into a prime (81364919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2260119 + ... + 2260154.

Almost surely, 2^81364914 is an apocalyptic number.

81364914 is an abundant number, since it is smaller than the sum of its proper divisors (94925772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81364914 is a wasteful number, since it uses less digits than its factorization.

81364914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520281 (or 4520278 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 81364914 is about 9020.2502182589. The cubic root of 81364914 is about 433.3236472523.

The spelling of 81364914 in words is "eighty-one million, three hundred sixty-four thousand, nine hundred fourteen".