81834601 has 4 divisors (see below), whose sum is σ = 82376704. Its totient is φ = 81292500.

The previous prime is 81834589. The next prime is 81834631. The reversal of 81834601 is 10643818.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81834601 - 2¹⁵ = 81801833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81834631) 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, 270825 + ... + 271126.

It is an arithmetic number, because the mean of its divisors is an integer number (20594176).

Almost surely, 2^81834601 is an apocalyptic number.

It is an amenable number.

81834601 is a deficient number, since it is larger than the sum of its proper divisors (542103).

81834601 is a wasteful number, since it uses less digits than its factorization.

81834601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542102.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 81834601 is about 9046.2478962275. The cubic root of 81834601 is about 434.1558491580.

The spelling of 81834601 in words is "eighty-one million, eight hundred thirty-four thousand, six hundred one".