659550613 has 4 divisors (see below), whose sum is σ = 669394720. Its totient is φ = 649706508.

The previous prime is 659550589. The next prime is 659550631. The reversal of 659550613 is 316055956.

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-659550613 is a prime.

It is a super-2 number, since 2×659550613² = 870014022217351538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659550643) 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, 4921953 + ... + 4922086.

It is an arithmetic number, because the mean of its divisors is an integer number (167348680).

Almost surely, 2^659550613 is an apocalyptic number.

It is an amenable number.

659550613 is a deficient number, since it is larger than the sum of its proper divisors (9844107).

659550613 is an equidigital number, since it uses as much as digits as its factorization.

659550613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9844106.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 659550613 is about 25681.7174854019. The cubic root of 659550613 is about 870.4611168102.

The spelling of 659550613 in words is "six hundred fifty-nine million, five hundred fifty thousand, six hundred thirteen".