81341861 has 8 divisors (see below), whose sum is σ = 84211200. Its totient is φ = 78487920.

The previous prime is 81341837. The next prime is 81341863. The reversal of 81341861 is 16814318.

It is a happy number.

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 81341861 - 2²² = 77147557 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 (81341863) 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, 7475 + ... + 14783.

It is an arithmetic number, because the mean of its divisors is an integer number (10526400).

Almost surely, 2^81341861 is an apocalyptic number.

It is an amenable number.

81341861 is a deficient number, since it is larger than the sum of its proper divisors (2869339).

81341861 is a wasteful number, since it uses less digits than its factorization.

81341861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699.

The product of its digits is 4608, while the sum is 32.

The square root of 81341861 is about 9018.9722806981. The cubic root of 81341861 is about 433.2827190719.

The spelling of 81341861 in words is "eighty-one million, three hundred forty-one thousand, eight hundred sixty-one".