83641857 has 16 divisors (see below), whose sum is σ = 126423360. Its totient is φ = 48762432.

The previous prime is 83641849. The next prime is 83641879. The reversal of 83641857 is 75814638.

It is not a de Polignac number, because 83641857 - 2³ = 83641849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83641847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55698 + ... + 57179.

It is an arithmetic number, because the mean of its divisors is an integer number (7901460).

Almost surely, 2^83641857 is an apocalyptic number.

It is an amenable number.

83641857 is a deficient number, since it is larger than the sum of its proper divisors (42781503).

83641857 is a wasteful number, since it uses less digits than its factorization.

83641857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112912.

The product of its digits is 161280, while the sum is 42.

The square root of 83641857 is about 9145.5922170191. The cubic root of 83641857 is about 437.3286090023.

The spelling of 83641857 in words is "eighty-three million, six hundred forty-one thousand, eight hundred fifty-seven".