2209791 has 8 divisors (see below), whose sum is σ = 2965120. Its totient is φ = 1463832.

The previous prime is 2209789. The next prime is 2209793. The reversal of 2209791 is 1979022.

It is an interprime number because it is at equal distance from previous prime (2209789) and next prime (2209793).

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

It is not a de Polignac number, because 2209791 - 2¹ = 2209789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209793) 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, 1771 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (370640).

2^2209791 is an apocalyptic number.

2209791 is a deficient number, since it is larger than the sum of its proper divisors (755329).

2209791 is a wasteful number, since it uses less digits than its factorization.

2209791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2209791 is about 1486.5365787629. The cubic root of 2209791 is about 130.2517999366.

It can be divided in two parts, 220 and 9791, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 2209791 in words is "two million, two hundred nine thousand, seven hundred ninety-one".