74223187 has 4 divisors (see below), whose sum is σ = 75268656. Its totient is φ = 73177720.

The previous prime is 74223169. The next prime is 74223197. The reversal of 74223187 is 78132247.

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

It is a cyclic number.

It is not a de Polignac number, because 74223187 - 2¹⁵ = 74190419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74223137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522628 + ... + 522769.

It is an arithmetic number, because the mean of its divisors is an integer number (18817164).

Almost surely, 2^74223187 is an apocalyptic number.

74223187 is a deficient number, since it is larger than the sum of its proper divisors (1045469).

74223187 is a wasteful number, since it uses less digits than its factorization.

74223187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045468.

The product of its digits is 18816, while the sum is 34.

The square root of 74223187 is about 8615.2879812575. The cubic root of 74223187 is about 420.2553001868.

It can be divided in two parts, 7422 and 3187, that added together give a square (10609 = 103²).

The spelling of 74223187 in words is "seventy-four million, two hundred twenty-three thousand, one hundred eighty-seven".