505645013 has 4 divisors (see below), whose sum is σ = 505698240. Its totient is φ = 505591788.

The previous prime is 505645003. The next prime is 505645027. The reversal of 505645013 is 310546505.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 505645013 - 2²⁰ = 504596437 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 (505645003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8045 + ... + 32802.

It is an arithmetic number, because the mean of its divisors is an integer number (126424560).

Almost surely, 2^505645013 is an apocalyptic number.

It is an amenable number.

505645013 is a deficient number, since it is larger than the sum of its proper divisors (53227).

505645013 is a wasteful number, since it uses less digits than its factorization.

505645013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53226.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 505645013 is about 22486.5518254800. The cubic root of 505645013 is about 796.6763215121.

The spelling of 505645013 in words is "five hundred five million, six hundred forty-five thousand, thirteen".