83861893 has 4 divisors (see below), whose sum is σ = 84044268. Its totient is φ = 83679520.

The previous prime is 83861891. The next prime is 83862001. The reversal of 83861893 is 39816838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39816838 = 2 ⋅19908419.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 66945124 = 4113^2 + 8182^2 .

It is a cyclic number.

It is not a de Polignac number, because 83861893 - 2¹ = 83861891 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 (83861891) 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, 90496 + ... + 91417.

It is an arithmetic number, because the mean of its divisors is an integer number (21011067).

Almost surely, 2^83861893 is an apocalyptic number.

It is an amenable number.

83861893 is a deficient number, since it is larger than the sum of its proper divisors (182375).

83861893 is a wasteful number, since it uses less digits than its factorization.

83861893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182374.

The product of its digits is 248832, while the sum is 46.

The square root of 83861893 is about 9157.6139359552. The cubic root of 83861893 is about 437.7117655630.

The spelling of 83861893 in words is "eighty-three million, eight hundred sixty-one thousand, eight hundred ninety-three".