74449745 has 4 divisors (see below), whose sum is σ = 89339700. Its totient is φ = 59559792.

The previous prime is 74449741. The next prime is 74449747. The reversal of 74449745 is 54794447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54794447 = 37 ⋅1480931.

It can be written as a sum of positive squares in 2 ways, for example, as 32821441 + 41628304 = 5729^2 + 6452^2 .

It is a cyclic number.

It is not a de Polignac number, because 74449745 - 2² = 74449741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74449696 and 74449705.

It is not an unprimeable number, because it can be changed into a prime (74449741) 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, 7444970 + ... + 7444979.

It is an arithmetic number, because the mean of its divisors is an integer number (22334925).

Almost surely, 2^74449745 is an apocalyptic number.

It is an amenable number.

74449745 is a deficient number, since it is larger than the sum of its proper divisors (14889955).

74449745 is a wasteful number, since it uses less digits than its factorization.

74449745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14889954.

The product of its digits is 564480, while the sum is 44.

The square root of 74449745 is about 8628.4265657187. The cubic root of 74449745 is about 420.6824600058.

The spelling of 74449745 in words is "seventy-four million, four hundred forty-nine thousand, seven hundred forty-five".