81486107 has 4 divisors (see below), whose sum is σ = 81746760. Its totient is φ = 81225456.

The previous prime is 81486103. The next prime is 81486127. The reversal of 81486107 is 70168418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81486107 - 2² = 81486103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81486103) 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, 129857 + ... + 130482.

It is an arithmetic number, because the mean of its divisors is an integer number (20436690).

Almost surely, 2^81486107 is an apocalyptic number.

81486107 is a deficient number, since it is larger than the sum of its proper divisors (260653).

81486107 is a wasteful number, since it uses less digits than its factorization.

81486107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260652.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 81486107 is about 9026.9655477353. The cubic root of 81486107 is about 433.5386856420.

The spelling of 81486107 in words is "eighty-one million, four hundred eighty-six thousand, one hundred seven".