74712643 has 4 divisors (see below), whose sum is σ = 75411000. Its totient is φ = 74014288.

The previous prime is 74712611. The next prime is 74712647. The reversal of 74712643 is 34621747.

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 74712643 - 2⁵ = 74712611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74712599 and 74712608.

It is not an unprimeable number, because it can be changed into a prime (74712647) 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, 349018 + ... + 349231.

It is an arithmetic number, because the mean of its divisors is an integer number (18852750).

Almost surely, 2^74712643 is an apocalyptic number.

74712643 is a deficient number, since it is larger than the sum of its proper divisors (698357).

74712643 is a wasteful number, since it uses less digits than its factorization.

74712643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698356.

The product of its digits is 28224, while the sum is 34.

The square root of 74712643 is about 8643.6475518151. The cubic root of 74712643 is about 421.1770515905.

The spelling of 74712643 in words is "seventy-four million, seven hundred twelve thousand, six hundred forty-three".