81484691 has 8 divisors (see below), whose sum is σ = 83183760. Its totient is φ = 79791712.

The previous prime is 81484687. The next prime is 81484703. The reversal of 81484691 is 19648418.

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

It is not a de Polignac number, because 81484691 - 2² = 81484687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81484631) 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, 33761 + ... + 36093.

It is an arithmetic number, because the mean of its divisors is an integer number (10397970).

Almost surely, 2^81484691 is an apocalyptic number.

81484691 is a deficient number, since it is larger than the sum of its proper divisors (1699069).

81484691 is a wasteful number, since it uses less digits than its factorization.

81484691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045.

The product of its digits is 55296, while the sum is 41.

The square root of 81484691 is about 9026.8871157227. The cubic root of 81484691 is about 433.5361743986.

The spelling of 81484691 in words is "eighty-one million, four hundred eighty-four thousand, six hundred ninety-one".