81292093 has 8 divisors (see below), whose sum is σ = 83526912. Its totient is φ = 79078416.

The previous prime is 81292067. The next prime is 81292117. The reversal of 81292093 is 39029218.

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 81292093 - 2⁵ = 81292061 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 (81292063) 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, 2671 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (10440864).

Almost surely, 2^81292093 is an apocalyptic number.

It is an amenable number.

81292093 is a deficient number, since it is larger than the sum of its proper divisors (2234819).

81292093 is a wasteful number, since it uses less digits than its factorization.

81292093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10571.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 81292093 is about 9016.2127858652. The cubic root of 81292093 is about 433.1943348402.

The spelling of 81292093 in words is "eighty-one million, two hundred ninety-two thousand, ninety-three".