2159659 has 4 divisors (see below), whose sum is σ = 2234160. Its totient is φ = 2085160.

The previous prime is 2159639. The next prime is 2159669. The reversal of 2159659 is 9569512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2159659 - 2⁵ = 2159627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159609) 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, 37207 + ... + 37264.

It is an arithmetic number, because the mean of its divisors is an integer number (558540).

2^2159659 is an apocalyptic number.

2159659 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2159659 is a deficient number, since it is larger than the sum of its proper divisors (74501).

2159659 is an equidigital number, since it uses as much as digits as its factorization.

2159659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74500.

The product of its digits is 24300, while the sum is 37.

The square root of 2159659 is about 1469.5778305350. The cubic root of 2159659 is about 129.2592786159.

The spelling of 2159659 in words is "two million, one hundred fifty-nine thousand, six hundred fifty-nine".