74816243 has 4 divisors (see below), whose sum is σ = 78753960. Its totient is φ = 70878528.

The previous prime is 74816233. The next prime is 74816279. The reversal of 74816243 is 34261847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34261847 = 29 ⋅1181443.

It is a cyclic number.

It is not a de Polignac number, because 74816243 - 2¹² = 74812147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74816233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968830 + ... + 1968867.

It is an arithmetic number, because the mean of its divisors is an integer number (19688490).

Almost surely, 2^74816243 is an apocalyptic number.

74816243 is a deficient number, since it is larger than the sum of its proper divisors (3937717).

74816243 is a wasteful number, since it uses less digits than its factorization.

74816243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937716.

The product of its digits is 32256, while the sum is 35.

The square root of 74816243 is about 8649.6383161378. The cubic root of 74816243 is about 421.3716361929.

The spelling of 74816243 in words is "seventy-four million, eight hundred sixteen thousand, two hundred forty-three".