2669491 has 4 divisors (see below), whose sum is σ = 2912184. Its totient is φ = 2426800.

The previous prime is 2669477. The next prime is 2669497. The reversal of 2669491 is 1949662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2669491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2669491.

It is not an unprimeable number, because it can be changed into a prime (2669497) 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, 121330 + ... + 121351.

It is an arithmetic number, because the mean of its divisors is an integer number (728046).

2^2669491 is an apocalyptic number.

2669491 is a deficient number, since it is larger than the sum of its proper divisors (242693).

2669491 is a wasteful number, since it uses less digits than its factorization.

2669491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242692.

The product of its digits is 23328, while the sum is 37.

The square root of 2669491 is about 1633.8577049425. The cubic root of 2669491 is about 138.7211946804.

It can be divided in two parts, 2669 and 491, that added together give a triangular number (3160 = T₇₉).

The spelling of 2669491 in words is "two million, six hundred sixty-nine thousand, four hundred ninety-one".