74247649 has 8 divisors (see below), whose sum is σ = 89320640. Its totient is φ = 60291216.

The previous prime is 74247623. The next prime is 74247661. The reversal of 74247649 is 94674247.

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 74247649 - 2⁹ = 74247137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74247149) 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, 278994 + ... + 279259.

It is an arithmetic number, because the mean of its divisors is an integer number (11165080).

Almost surely, 2^74247649 is an apocalyptic number.

It is an amenable number.

74247649 is a deficient number, since it is larger than the sum of its proper divisors (15072991).

74247649 is a wasteful number, since it uses less digits than its factorization.

74247649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558279.

The product of its digits is 338688, while the sum is 43.

The square root of 74247649 is about 8616.7075498708. The cubic root of 74247649 is about 420.3014634609.

The spelling of 74247649 in words is "seventy-four million, two hundred forty-seven thousand, six hundred forty-nine".