64630247 has 16 divisors (see below), whose sum is σ = 72876672. Its totient is φ = 56807520.

The previous prime is 64630211. The next prime is 64630249. The reversal of 64630247 is 74203646.

It is not a de Polignac number, because 64630247 - 2⁸ = 64629991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64630249) 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 15 ways as a sum of consecutive naturals, for example, 49973 + ... + 51249.

It is an arithmetic number, because the mean of its divisors is an integer number (4554792).

Almost surely, 2^64630247 is an apocalyptic number.

64630247 is a deficient number, since it is larger than the sum of its proper divisors (8246425).

64630247 is a wasteful number, since it uses less digits than its factorization.

64630247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 64630247 is about 8039.2939366589. The cubic root of 64630247 is about 401.3087279911.

The spelling of 64630247 in words is "sixty-four million, six hundred thirty thousand, two hundred forty-seven".