2609993 has 4 divisors (see below), whose sum is σ = 2763540. Its totient is φ = 2456448.

The previous prime is 2609989. The next prime is 2610059. The reversal of 2609993 is 3999062.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1882384 + 727609 = 1372^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2609993 - 2² = 2609989 is a prime.

It is a super-3 number, since 3×2609993³ = 53338313838851008971, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609903) 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, 76748 + ... + 76781.

It is an arithmetic number, because the mean of its divisors is an integer number (690885).

2^2609993 is an apocalyptic number.

It is an amenable number.

2609993 is a deficient number, since it is larger than the sum of its proper divisors (153547).

2609993 is a wasteful number, since it uses less digits than its factorization.

2609993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153546.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 2609993 is about 1615.5472756933. The cubic root of 2609993 is about 137.6828289672.

The spelling of 2609993 in words is "two million, six hundred nine thousand, nine hundred ninety-three".