74042447 has 4 divisors (see below), whose sum is σ = 74062440. Its totient is φ = 74022456.

The previous prime is 74042413. The next prime is 74042453. The reversal of 74042447 is 74424047.

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 74042447 - 2¹² = 74038351 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 (74042047) 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, 2633 + ... + 12450.

It is an arithmetic number, because the mean of its divisors is an integer number (18515610).

Almost surely, 2^74042447 is an apocalyptic number.

74042447 is a deficient number, since it is larger than the sum of its proper divisors (19993).

74042447 is a wasteful number, since it uses less digits than its factorization.

74042447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19992.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 74042447 is about 8604.7920951061. The cubic root of 74042447 is about 419.9139033649.

The spelling of 74042447 in words is "seventy-four million, forty-two thousand, four hundred forty-seven".