659241991 has 8 divisors (see below), whose sum is σ = 665995904. Its totient is φ = 652519800.

The previous prime is 659241983. The next prime is 659242009. The reversal of 659241991 is 199142956.

It is a happy number.

659241991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 659241991 - 2³ = 659241983 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 (659241941) 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, 35020 + ... + 50446.

It is an arithmetic number, because the mean of its divisors is an integer number (83249488).

Almost surely, 2^659241991 is an apocalyptic number.

659241991 is a deficient number, since it is larger than the sum of its proper divisors (6753913).

659241991 is a wasteful number, since it uses less digits than its factorization.

659241991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861.

The product of its digits is 174960, while the sum is 46.

The square root of 659241991 is about 25675.7081888699. The cubic root of 659241991 is about 870.3253246722.

The spelling of 659241991 in words is "six hundred fifty-nine million, two hundred forty-one thousand, nine hundred ninety-one".