74649609 has 24 divisors (see below), whose sum is σ = 111223112. Its totient is φ = 48211200.

The previous prime is 74649607. The next prime is 74649629. The reversal of 74649609 is 90694647.

It can be written as a sum of positive squares in 4 ways, for example, as 40602384 + 34047225 = 6372^2 + 5835^2 .

It is not a de Polignac number, because 74649609 - 2¹ = 74649607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74649607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123909 + ... + 124509.

Almost surely, 2^74649609 is an apocalyptic number.

It is an amenable number.

74649609 is a deficient number, since it is larger than the sum of its proper divisors (36573503).

74649609 is a wasteful number, since it uses less digits than its factorization.

74649609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 74649609 is about 8640.0005208333. Note that the first 3 decimals coincide. The cubic root of 74649609 is about 421.0585712241.

The spelling of 74649609 in words is "seventy-four million, six hundred forty-nine thousand, six hundred nine".