645230013 has 8 divisors (see below), whose sum is σ = 883558368. Its totient is φ = 418527504.

The previous prime is 645229999. The next prime is 645230029. The reversal of 645230013 is 310032546.

It is a happy number.

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

It is not a de Polignac number, because 645230013 - 2¹⁴ = 645213629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645230513) 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 7 ways as a sum of consecutive naturals, for example, 2906331 + ... + 2906552.

It is an arithmetic number, because the mean of its divisors is an integer number (110444796).

Almost surely, 2^645230013 is an apocalyptic number.

It is an amenable number.

645230013 is a deficient number, since it is larger than the sum of its proper divisors (238328355).

645230013 is a wasteful number, since it uses less digits than its factorization.

645230013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812923.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 645230013 is about 25401.3781712725. The cubic root of 645230013 is about 864.1149525015.

Adding to 645230013 its reverse (310032546), we get a palindrome (955262559).

The spelling of 645230013 in words is "six hundred forty-five million, two hundred thirty thousand, thirteen".