81396110 has 8 divisors (see below), whose sum is σ = 146513016. Its totient is φ = 32558440.

The previous prime is 81396109. The next prime is 81396199. The reversal of 81396110 is 1169318.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4069796 + ... + 4069815.

It is an arithmetic number, because the mean of its divisors is an integer number (18314127).

Almost surely, 2^81396110 is an apocalyptic number.

81396110 is a deficient number, since it is larger than the sum of its proper divisors (65116906).

81396110 is a wasteful number, since it uses less digits than its factorization.

81396110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8139618.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 81396110 is about 9021.9792728647. The cubic root of 81396110 is about 433.3790201666.

The spelling of 81396110 in words is "eighty-one million, three hundred ninety-six thousand, one hundred ten".