64744747 has 8 divisors (see below), whose sum is σ = 68835744. Its totient is φ = 60760128.

The previous prime is 64744711. The next prime is 64744769. The reversal of 64744747 is 74744746.

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 64744747 - 2¹⁹ = 64220459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64744787) 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, 25338 + ... + 27775.

It is an arithmetic number, because the mean of its divisors is an integer number (8604468).

Almost surely, 2^64744747 is an apocalyptic number.

64744747 is a deficient number, since it is larger than the sum of its proper divisors (4090997).

64744747 is a wasteful number, since it uses less digits than its factorization.

64744747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53189.

The product of its digits is 526848, while the sum is 43.

The square root of 64744747 is about 8046.4120575571. The cubic root of 64744747 is about 401.5455765410.

Subtracting 64744747 from its reverse (74744746), we obtain a palindrome (9999999).

The spelling of 64744747 in words is "sixty-four million, seven hundred forty-four thousand, seven hundred forty-seven".