74997649 has 8 divisors (see below), whose sum is σ = 77661440. Its totient is φ = 72349200.

The previous prime is 74997647. The next prime is 74997653. The reversal of 74997649 is 94679947.

It is a happy number.

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 74997649 - 2¹ = 74997647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74997649.

It is not an unprimeable number, because it can be changed into a prime (74997647) 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, 6607 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (9707680).

Almost surely, 2^74997649 is an apocalyptic number.

It is an amenable number.

74997649 is a deficient number, since it is larger than the sum of its proper divisors (2663791).

74997649 is a wasteful number, since it uses less digits than its factorization.

74997649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671.

The product of its digits is 3429216, while the sum is 55.

The square root of 74997649 is about 8660.1183017324. The cubic root of 74997649 is about 421.7119261377.

The spelling of 74997649 in words is "seventy-four million, nine hundred ninety-seven thousand, six hundred forty-nine".