64730647 has 4 divisors (see below), whose sum is σ = 64765120. Its totient is φ = 64696176.

The previous prime is 64730563. The next prime is 64730657. The reversal of 64730647 is 74603746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64730647 - 2¹⁵ = 64697879 is a prime.

It is a super-2 number, since 2×64730647² = 8380113322077218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64730657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14247 + ... + 18232.

It is an arithmetic number, because the mean of its divisors is an integer number (16191280).

Almost surely, 2^64730647 is an apocalyptic number.

64730647 is a deficient number, since it is larger than the sum of its proper divisors (34473).

64730647 is a wasteful number, since it uses less digits than its factorization.

64730647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34472.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 64730647 is about 8045.5358429380. The cubic root of 64730647 is about 401.5164251224.

The spelling of 64730647 in words is "sixty-four million, seven hundred thirty thousand, six hundred forty-seven".