8391874 has 4 divisors (see below), whose sum is σ = 12587814. Its totient is φ = 4195936.

The previous prime is 8391841. The next prime is 8391893. The reversal of 8391874 is 4781938.

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

It can be written as a sum of positive squares in only one way, i.e., 4995225 + 3396649 = 2235^2 + 1843^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097967 + ... + 2097970.

Almost surely, 2^8391874 is an apocalyptic number.

8391874 is a deficient number, since it is larger than the sum of its proper divisors (4195940).

8391874 is a wasteful number, since it uses less digits than its factorization.

8391874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195939.

The product of its digits is 48384, while the sum is 40.

The square root of 8391874 is about 2896.8731418549. The cubic root of 8391874 is about 203.2137007161.

The spelling of 8391874 in words is "eight million, three hundred ninety-one thousand, eight hundred seventy-four".