74224243 has 4 divisors (see below), whose sum is σ = 77451408. Its totient is φ = 70997080.

The previous prime is 74224237. The next prime is 74224277. The reversal of 74224243 is 34242247.

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 74224243 - 2²¹ = 72127091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74224223) 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, 1613548 + ... + 1613593.

It is an arithmetic number, because the mean of its divisors is an integer number (19362852).

Almost surely, 2^74224243 is an apocalyptic number.

74224243 is a deficient number, since it is larger than the sum of its proper divisors (3227165).

74224243 is a wasteful number, since it uses less digits than its factorization.

74224243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227164.

The product of its digits is 10752, while the sum is 28.

The square root of 74224243 is about 8615.3492674412. The cubic root of 74224243 is about 420.2572932185.

The spelling of 74224243 in words is "seventy-four million, two hundred twenty-four thousand, two hundred forty-three".