74287843 has 4 divisors (see below), whose sum is σ = 84900400. Its totient is φ = 63675288.

The previous prime is 74287819. The next prime is 74287849. The reversal of 74287843 is 34878247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74287843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74287843.

It is not an unprimeable number, because it can be changed into a prime (74287849) 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, 5306268 + ... + 5306281.

It is an arithmetic number, because the mean of its divisors is an integer number (21225100).

Almost surely, 2^74287843 is an apocalyptic number.

74287843 is a deficient number, since it is larger than the sum of its proper divisors (10612557).

74287843 is a wasteful number, since it uses less digits than its factorization.

74287843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612556.

The product of its digits is 301056, while the sum is 43.

The square root of 74287843 is about 8619.0395636637. The cubic root of 74287843 is about 420.3772932446.

The spelling of 74287843 in words is "seventy-four million, two hundred eighty-seven thousand, eight hundred forty-three".