74707643 has 4 divisors (see below), whose sum is σ = 74777088. Its totient is φ = 74638200.

The previous prime is 74707609. The next prime is 74707679. The reversal of 74707643 is 34670747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34670747 = 29 ⋅1195543.

It is a cyclic number.

It is not a de Polignac number, because 74707643 - 2¹⁴ = 74691259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74707597 and 74707606.

It is not an unprimeable number, because it can be changed into a prime (74707603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33083 + ... + 35268.

It is an arithmetic number, because the mean of its divisors is an integer number (18694272).

Almost surely, 2^74707643 is an apocalyptic number.

74707643 is a deficient number, since it is larger than the sum of its proper divisors (69445).

74707643 is a wasteful number, since it uses less digits than its factorization.

74707643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69444.

The product of its (nonzero) digits is 98784, while the sum is 38.

The square root of 74707643 is about 8643.3583172283. The cubic root of 74707643 is about 421.1676558927.

The spelling of 74707643 in words is "seventy-four million, seven hundred seven thousand, six hundred forty-three".