2591629 has 4 divisors (see below), whose sum is σ = 2610684. Its totient is φ = 2572576.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591629 is 9261952.

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 1822500 + 769129 = 1350^2 + 877^2 .

It is a cyclic number.

It is not a de Polignac number, because 2591629 - 2¹³ = 2583437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2591594 and 2591603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591623) 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, 9322 + ... + 9595.

It is an arithmetic number, because the mean of its divisors is an integer number (652671).

2^2591629 is an apocalyptic number.

It is an amenable number.

2591629 is a deficient number, since it is larger than the sum of its proper divisors (19055).

2591629 is a wasteful number, since it uses less digits than its factorization.

2591629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19054.

The product of its digits is 9720, while the sum is 34.

The square root of 2591629 is about 1609.8537200628. The cubic root of 2591629 is about 137.3591549513.

The spelling of 2591629 in words is "two million, five hundred ninety-one thousand, six hundred twenty-nine".