64630253 has 4 divisors (see below), whose sum is σ = 67440288. Its totient is φ = 61820220.

The previous prime is 64630249. The next prime is 64630259. The reversal of 64630253 is 35203646.

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 not a de Polignac number, because 64630253 - 2² = 64630249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64630259) 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, 1404983 + ... + 1405028.

It is an arithmetic number, because the mean of its divisors is an integer number (16860072).

Almost surely, 2^64630253 is an apocalyptic number.

It is an amenable number.

64630253 is a deficient number, since it is larger than the sum of its proper divisors (2810035).

64630253 is a wasteful number, since it uses less digits than its factorization.

64630253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810034.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 64630253 is about 8039.2943098260. The cubic root of 64630253 is about 401.3087404097.

Adding to 64630253 its reverse (35203646), we get a palindrome (99833899).

The spelling of 64630253 in words is "sixty-four million, six hundred thirty thousand, two hundred fifty-three".