81944095 has 8 divisors (see below), whose sum is σ = 100188576. Its totient is φ = 64318176.

The previous prime is 81944089. The next prime is 81944099. The reversal of 81944095 is 59044918.

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 81944095 - 2⁹ = 81943583 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 (81944099) 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, 154347 + ... + 154876.

It is an arithmetic number, because the mean of its divisors is an integer number (12523572).

Almost surely, 2^81944095 is an apocalyptic number.

81944095 is a deficient number, since it is larger than the sum of its proper divisors (18244481).

81944095 is a wasteful number, since it uses less digits than its factorization.

81944095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309281.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 81944095 is about 9052.2977745984. The cubic root of 81944095 is about 434.3493951403.

The spelling of 81944095 in words is "eighty-one million, nine hundred forty-four thousand, ninety-five".