2643959 has 16 divisors (see below), whose sum is σ = 3006720. Its totient is φ = 2311680.

The previous prime is 2643947. The next prime is 2643961. The reversal of 2643959 is 9593462.

It is a cyclic number.

It is not a de Polignac number, because 2643959 - 2⁴ = 2643943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15197 + ... + 15369.

It is an arithmetic number, because the mean of its divisors is an integer number (187920).

2^2643959 is an apocalyptic number.

2643959 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2643959 is a deficient number, since it is larger than the sum of its proper divisors (362761).

2643959 is a wasteful number, since it uses less digits than its factorization.

2643959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its digits is 58320, while the sum is 38.

The square root of 2643959 is about 1626.0255225549. The cubic root of 2643959 is about 138.2775168760.

The spelling of 2643959 in words is "two million, six hundred forty-three thousand, nine hundred fifty-nine".