74798749 has 4 divisors (see below), whose sum is σ = 76025020. Its totient is φ = 73572480.

The previous prime is 74798747. The next prime is 74798771. The reversal of 74798749 is 94789747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94789747 = 13 ⋅7291519.

It can be written as a sum of positive squares in 2 ways, for example, as 39312900 + 35485849 = 6270^2 + 5957^2 .

It is a cyclic number.

It is not a de Polignac number, because 74798749 - 2¹ = 74798747 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 74798749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74798747) 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, 613044 + ... + 613165.

It is an arithmetic number, because the mean of its divisors is an integer number (19006255).

Almost surely, 2^74798749 is an apocalyptic number.

It is an amenable number.

74798749 is a deficient number, since it is larger than the sum of its proper divisors (1226271).

74798749 is a wasteful number, since it uses less digits than its factorization.

74798749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226270.

The product of its digits is 3556224, while the sum is 55.

The square root of 74798749 is about 8648.6270008597. The cubic root of 74798749 is about 421.3387910524.

The spelling of 74798749 in words is "seventy-four million, seven hundred ninety-eight thousand, seven hundred forty-nine".