81926097 has 16 divisors (see below), whose sum is σ = 120327168. Its totient is φ = 49168080.

The previous prime is 81926083. The next prime is 81926099. The reversal of 81926097 is 79062918.

It is not a de Polignac number, because 81926097 - 2¹⁰ = 81925073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81926099) 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 15 ways as a sum of consecutive naturals, for example, 8653 + ... + 15450.

It is an arithmetic number, because the mean of its divisors is an integer number (7520448).

Almost surely, 2^81926097 is an apocalyptic number.

It is an amenable number.

81926097 is a deficient number, since it is larger than the sum of its proper divisors (38401071).

81926097 is a wasteful number, since it uses less digits than its factorization.

81926097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24220.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 81926097 is about 9051.3036077683. The cubic root of 81926097 is about 434.3175930000.

The spelling of 81926097 in words is "eighty-one million, nine hundred twenty-six thousand, ninety-seven".