81827453 has 8 divisors (see below), whose sum is σ = 82543296. Its totient is φ = 81115200.

The previous prime is 81827441. The next prime is 81827479. The reversal of 81827453 is 35472818.

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

It is a cyclic number.

It is not a de Polignac number, because 81827453 - 2¹⁶ = 81761917 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 (81827483) 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, 62738 + ... + 64028.

It is an arithmetic number, because the mean of its divisors is an integer number (10317912).

Almost surely, 2^81827453 is an apocalyptic number.

It is an amenable number.

81827453 is a deficient number, since it is larger than the sum of its proper divisors (715843).

81827453 is a wasteful number, since it uses less digits than its factorization.

81827453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795.

The product of its digits is 53760, while the sum is 38.

The square root of 81827453 is about 9045.8528066733. The cubic root of 81827453 is about 434.1432080651.

The spelling of 81827453 in words is "eighty-one million, eight hundred twenty-seven thousand, four hundred fifty-three".