2026691 has 4 divisors (see below), whose sum is σ = 2114832. Its totient is φ = 1938552.

The previous prime is 2026679. The next prime is 2026697. The reversal of 2026691 is 1966202.

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 2026691 - 2⁶ = 2026627 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 2026691.

It is not an unprimeable number, because it can be changed into a prime (2026697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44036 + ... + 44081.

It is an arithmetic number, because the mean of its divisors is an integer number (528708).

2^2026691 is an apocalyptic number.

2026691 is a deficient number, since it is larger than the sum of its proper divisors (88141).

2026691 is an equidigital number, since it uses as much as digits as its factorization.

2026691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88140.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2026691 is about 1423.6189799241. The cubic root of 2026691 is about 126.5501059143.

The spelling of 2026691 in words is "two million, twenty-six thousand, six hundred ninety-one".