81795933 has 32 divisors (see below), whose sum is σ = 126720000. Its totient is φ = 52094448.

The previous prime is 81795913. The next prime is 81795947. The reversal of 81795933 is 33959718.

It is a happy number.

It is not a de Polignac number, because 81795933 - 2¹² = 81791837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81795913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53818 + ... + 55316.

It is an arithmetic number, because the mean of its divisors is an integer number (3960000).

Almost surely, 2^81795933 is an apocalyptic number.

It is an amenable number.

81795933 is a deficient number, since it is larger than the sum of its proper divisors (44924067).

81795933 is a wasteful number, since it uses less digits than its factorization.

81795933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1592 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 81795933 is about 9044.1104040143. The cubic root of 81795933 is about 434.0874568030.

It can be divided in two parts, 81795 and 933, that added together give a palindrome (82728).

The spelling of 81795933 in words is "eighty-one million, seven hundred ninety-five thousand, nine hundred thirty-three".