81626327 has 4 divisors (see below), whose sum is σ = 82082520. Its totient is φ = 81170136.

The previous prime is 81626297. The next prime is 81626353. The reversal of 81626327 is 72362618.

It is a happy number.

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 81626327 - 2¹⁰ = 81625303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81626227) 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, 227828 + ... + 228185.

It is an arithmetic number, because the mean of its divisors is an integer number (20520630).

Almost surely, 2^81626327 is an apocalyptic number.

81626327 is a deficient number, since it is larger than the sum of its proper divisors (456193).

81626327 is a wasteful number, since it uses less digits than its factorization.

81626327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456192.

The product of its digits is 24192, while the sum is 35.

The square root of 81626327 is about 9034.7289389334. The cubic root of 81626327 is about 433.7872186363.

The spelling of 81626327 in words is "eighty-one million, six hundred twenty-six thousand, three hundred twenty-seven".