81935003 has 4 divisors (see below), whose sum is σ = 82457040. Its totient is φ = 81412968.

The previous prime is 81934999. The next prime is 81935023. The reversal of 81935003 is 30053918.

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 81935003 - 2² = 81934999 is a prime.

It is a super-2 number, since 2×81935003² = 13426689433220018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81935023) 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, 260783 + ... + 261096.

It is an arithmetic number, because the mean of its divisors is an integer number (20614260).

Almost surely, 2^81935003 is an apocalyptic number.

81935003 is a deficient number, since it is larger than the sum of its proper divisors (522037).

81935003 is a wasteful number, since it uses less digits than its factorization.

81935003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522036.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 81935003 is about 9051.7955677313. The cubic root of 81935003 is about 434.3333303229. Note that the first 5 decimals are identical.

The spelling of 81935003 in words is "eighty-one million, nine hundred thirty-five thousand, three".