81854083 has 4 divisors (see below), whose sum is σ = 81875448. Its totient is φ = 81832720.

The previous prime is 81854077. The next prime is 81854107. The reversal of 81854083 is 38045818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81854083 - 2⁵ = 81854051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81854783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3178 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (20468862).

Almost surely, 2^81854083 is an apocalyptic number.

81854083 is a deficient number, since it is larger than the sum of its proper divisors (21365).

81854083 is a wasteful number, since it uses less digits than its factorization.

81854083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21364.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 81854083 is about 9047.3246321772. The cubic root of 81854083 is about 434.1902989426.

The spelling of 81854083 in words is "eighty-one million, eight hundred fifty-four thousand, eighty-three".