81842063 has 8 divisors (see below), whose sum is σ = 91217520. Its totient is φ = 72973440.

The previous prime is 81842023. The next prime is 81842083. The reversal of 81842063 is 36024818.

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 81842063 - 2⁸ = 81841807 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 (81842003) 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, 126368 + ... + 127013.

It is an arithmetic number, because the mean of its divisors is an integer number (11402190).

Almost surely, 2^81842063 is an apocalyptic number.

81842063 is a deficient number, since it is larger than the sum of its proper divisors (9375457).

81842063 is a wasteful number, since it uses less digits than its factorization.

81842063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253417.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 81842063 is about 9046.6603230142. The cubic root of 81842063 is about 434.1690447681.

The spelling of 81842063 in words is "eighty-one million, eight hundred forty-two thousand, sixty-three".