81149714 has 8 divisors (see below), whose sum is σ = 125922060. Its totient is φ = 39175696.

The previous prime is 81149711. The next prime is 81149749. The reversal of 81149714 is 41794118.

It can be written as a sum of positive squares in 2 ways, for example, as 73393489 + 7756225 = 8567^2 + 2785^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81149711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699509 + ... + 699624.

Almost surely, 2^81149714 is an apocalyptic number.

81149714 is a deficient number, since it is larger than the sum of its proper divisors (44772346).

81149714 is a wasteful number, since it uses less digits than its factorization.

81149714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399164.

The product of its digits is 8064, while the sum is 35.

The square root of 81149714 is about 9008.3136046654. The cubic root of 81149714 is about 432.9412810376.

The spelling of 81149714 in words is "eighty-one million, one hundred forty-nine thousand, seven hundred fourteen".