74815609 has 8 divisors (see below), whose sum is σ = 81686880. Its totient is φ = 67956000.

The previous prime is 74815567. The next prime is 74815613. The reversal of 74815609 is 90651847.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74815609 - 2¹³ = 74807417 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (74815309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15709 + ... + 19909.

It is an arithmetic number, because the mean of its divisors is an integer number (10210860).

Almost surely, 2^74815609 is an apocalyptic number.

It is an amenable number.

74815609 is a deficient number, since it is larger than the sum of its proper divisors (6871271).

74815609 is a wasteful number, since it uses less digits than its factorization.

74815609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 74815609 is about 8649.6016671290. The cubic root of 74815609 is about 421.3704459416.

The spelling of 74815609 in words is "seventy-four million, eight hundred fifteen thousand, six hundred nine".