64368637 has 4 divisors (see below), whose sum is σ = 67756480. Its totient is φ = 60980796.

The previous prime is 64368631. The next prime is 64368653. The reversal of 64368637 is 73686346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64368637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64368593 and 64368602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64368631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693893 + ... + 1693930.

It is an arithmetic number, because the mean of its divisors is an integer number (16939120).

Almost surely, 2^64368637 is an apocalyptic number.

It is an amenable number.

64368637 is a deficient number, since it is larger than the sum of its proper divisors (3387843).

64368637 is a wasteful number, since it uses less digits than its factorization.

64368637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387842.

The product of its digits is 435456, while the sum is 43.

The square root of 64368637 is about 8023.0067306466. The cubic root of 64368637 is about 400.7665239144.

The spelling of 64368637 in words is "sixty-four million, three hundred sixty-eight thousand, six hundred thirty-seven".