74528749 has 2 divisors, whose sum is σ = 74528750. Its totient is φ = 74528748.

The previous prime is 74528711. The next prime is 74528791. The reversal of 74528749 is 94782547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 5522500 = 8307^2 + 2350^2 .

It is an emirp because it is prime and its reverse (94782547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74528749 - 2¹³ = 74520557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74528699 and 74528708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74598749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37264374 + 37264375.

It is an arithmetic number, because the mean of its divisors is an integer number (37264375).

Almost surely, 2^74528749 is an apocalyptic number.

It is an amenable number.

74528749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74528749 is an equidigital number, since it uses as much as digits as its factorization.

74528749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 74528749 is about 8633.0034750369. The cubic root of 74528749 is about 420.8312129118.

The spelling of 74528749 in words is "seventy-four million, five hundred twenty-eight thousand, seven hundred forty-nine".