2289691 has 8 divisors (see below), whose sum is σ = 2381184. Its totient is φ = 2199360.

The previous prime is 2289689. The next prime is 2289697. The reversal of 2289691 is 1969822.

2289691 = T₁₂₃₄ + T₁₂₃₅ + T₁₂₃₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2289691 - 2¹ = 2289689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2289691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7065 + ... + 7381.

It is an arithmetic number, because the mean of its divisors is an integer number (297648).

2^2289691 is an apocalyptic number.

2289691 is the 1236-th centered triangular number.

2289691 is a deficient number, since it is larger than the sum of its proper divisors (91493).

2289691 is a wasteful number, since it uses less digits than its factorization.

2289691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 15552, while the sum is 37.

The square root of 2289691 is about 1513.1724951241. The cubic root of 2289691 is about 131.8031002239.

The spelling of 2289691 in words is "two million, two hundred eighty-nine thousand, six hundred ninety-one".