659396221 has 8 divisors (see below), whose sum is σ = 761655744. Its totient is φ = 564189120.

The previous prime is 659396219. The next prime is 659396237. The reversal of 659396221 is 122693956.

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

It is not a de Polignac number, because 659396221 - 2¹ = 659396219 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 (659396201) 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, 1762905 + ... + 1763278.

It is an arithmetic number, because the mean of its divisors is an integer number (95206968).

Almost surely, 2^659396221 is an apocalyptic number.

It is an amenable number.

659396221 is a deficient number, since it is larger than the sum of its proper divisors (102259523).

659396221 is a wasteful number, since it uses less digits than its factorization.

659396221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3526211.

The product of its digits is 174960, while the sum is 43.

The square root of 659396221 is about 25678.7114357399. The cubic root of 659396221 is about 870.3931903980.

The spelling of 659396221 in words is "six hundred fifty-nine million, three hundred ninety-six thousand, two hundred twenty-one".