74987209 has 16 divisors (see below), whose sum is σ = 84115584. Its totient is φ = 66821040.

The previous prime is 74987207. The next prime is 74987249. The reversal of 74987209 is 90278947.

It is not a de Polignac number, because 74987209 - 2¹ = 74987207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74987201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70012 + ... + 71074.

It is an arithmetic number, because the mean of its divisors is an integer number (5257224).

Almost surely, 2^74987209 is an apocalyptic number.

It is an amenable number.

74987209 is a deficient number, since it is larger than the sum of its proper divisors (9128375).

74987209 is a wasteful number, since it uses less digits than its factorization.

74987209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 74987209 is about 8659.5155176257. The cubic root of 74987209 is about 421.6923571829.

The spelling of 74987209 in words is "seventy-four million, nine hundred eighty-seven thousand, two hundred nine".