874172218 has 4 divisors (see below), whose sum is σ = 1311258330. Its totient is φ = 437086108.

The previous prime is 874172207. The next prime is 874172219. The reversal of 874172218 is 812271478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812271478 = 2 ⋅406135739.

It can be written as a sum of positive squares in only one way, i.e., 583367409 + 290804809 = 24153^2 + 17053^2 .

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 not an unprimeable number, because it can be changed into a prime (874172219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218543053 + ... + 218543056.

Almost surely, 2^874172218 is an apocalyptic number.

874172218 is a deficient number, since it is larger than the sum of its proper divisors (437086112).

874172218 is a wasteful number, since it uses less digits than its factorization.

874172218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437086111.

The product of its digits is 50176, while the sum is 40.

The square root of 874172218 is about 29566.4035350937. The cubic root of 874172218 is about 956.1638790796.

The spelling of 874172218 in words is "eight hundred seventy-four million, one hundred seventy-two thousand, two hundred eighteen".