74749 has 4 divisors (see below), whose sum is σ = 79164. Its totient is φ = 70336.

The previous prime is 74747. The next prime is 74759. The reversal of 74749 is 94747.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 27225 = 218^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 74749 - 2¹ = 74747 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

74749 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 74749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (19791).

2⁷⁴⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

74749 is a deficient number, since it is larger than the sum of its proper divisors (4415).

74749 is a wasteful number, since it uses less digits than its factorization.

74749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414.

The product of its digits is 7056, while the sum is 31.

The square root of 74749 is about 273.4026334913. The cubic root of 74749 is about 42.1245358864.

The spelling of 74749 in words is "seventy-four thousand, seven hundred forty-nine".