64635243 has 8 divisors (see below), whose sum is σ = 86516688. Its totient is φ = 42921984.

The previous prime is 64635227. The next prime is 64635301. The reversal of 64635243 is 34253646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64635243 - 2⁴ = 64635227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64635443) 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, 41146 + ... + 42687.

It is an arithmetic number, because the mean of its divisors is an integer number (10814586).

Almost surely, 2^64635243 is an apocalyptic number.

64635243 is a deficient number, since it is larger than the sum of its proper divisors (21881445).

64635243 is a wasteful number, since it uses less digits than its factorization.

64635243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84093.

The product of its digits is 51840, while the sum is 33.

The square root of 64635243 is about 8039.6046544591. The cubic root of 64635243 is about 401.3190682824.

Adding to 64635243 its reverse (34253646), we get a palindrome (98888889).

The spelling of 64635243 in words is "sixty-four million, six hundred thirty-five thousand, two hundred forty-three".