2659997 has 4 divisors (see below), whose sum is σ = 2676480. Its totient is φ = 2643516.

The previous prime is 2659963. The next prime is 2659999. The reversal of 2659997 is 7999562.

2659997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7999562 = 2 ⋅3999781.

It is a cyclic number.

It is not a de Polignac number, because 2659997 - 2¹⁸ = 2397853 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 (2659999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7997 + ... + 8322.

It is an arithmetic number, because the mean of its divisors is an integer number (669120).

2^2659997 is an apocalyptic number.

It is an amenable number.

2659997 is a deficient number, since it is larger than the sum of its proper divisors (16483).

2659997 is a wasteful number, since it uses less digits than its factorization.

2659997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482.

The product of its digits is 306180, while the sum is 47.

The square root of 2659997 is about 1630.9497233207. The cubic root of 2659997 is about 138.5565461346.

The spelling of 2659997 in words is "two million, six hundred fifty-nine thousand, nine hundred ninety-seven".