74830247 has 4 divisors (see below), whose sum is σ = 78083760. Its totient is φ = 71576736.

The previous prime is 74830241. The next prime is 74830267. The reversal of 74830247 is 74203847.

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

It is not a de Polignac number, because 74830247 - 2¹² = 74826151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74830241) 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, 1626722 + ... + 1626767.

It is an arithmetic number, because the mean of its divisors is an integer number (19520940).

Almost surely, 2^74830247 is an apocalyptic number.

74830247 is a deficient number, since it is larger than the sum of its proper divisors (3253513).

74830247 is a wasteful number, since it uses less digits than its factorization.

74830247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253512.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 74830247 is about 8650.4477918776. The cubic root of 74830247 is about 421.3979251377.

The spelling of 74830247 in words is "seventy-four million, eight hundred thirty thousand, two hundred forty-seven".