9871894 has 4 divisors (see below), whose sum is σ = 14807844. Its totient is φ = 4935946.

The previous prime is 9871891. The next prime is 9871907. The reversal of 9871894 is 4981789.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×9871894² = 194908582294472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2467972 + ... + 2467975.

It is an arithmetic number, because the mean of its divisors is an integer number (3701961).

Almost surely, 2^9871894 is an apocalyptic number.

9871894 is a deficient number, since it is larger than the sum of its proper divisors (4935950).

9871894 is a wasteful number, since it uses less digits than its factorization.

9871894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935949.

The product of its digits is 145152, while the sum is 46.

The square root of 9871894 is about 3141.9570334427. The cubic root of 9871894 is about 214.5195255743.

The spelling of 9871894 in words is "nine million, eight hundred seventy-one thousand, eight hundred ninety-four".