2626991 has 4 divisors (see below), whose sum is σ = 2741232. Its totient is φ = 2512752.

The previous prime is 2626973. The next prime is 2627021. The reversal of 2626991 is 1996262.

2626991 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.

It is a cyclic number.

It is not a de Polignac number, because 2626991 - 2⁶ = 2626927 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2626901) 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, 57086 + ... + 57131.

It is an arithmetic number, because the mean of its divisors is an integer number (685308).

2^2626991 is an apocalyptic number.

2626991 is a deficient number, since it is larger than the sum of its proper divisors (114241).

2626991 is a wasteful number, since it uses less digits than its factorization.

2626991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114240.

The product of its digits is 11664, while the sum is 35.

The square root of 2626991 is about 1620.7994940769. The cubic root of 2626991 is about 137.9810763101.

The spelling of 2626991 in words is "two million, six hundred twenty-six thousand, nine hundred ninety-one".