2169391 has 8 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 1852728.

The previous prime is 2169389. The next prime is 2169397. The reversal of 2169391 is 1939612.

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 2169391 - 2¹ = 2169389 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 (2169397) 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, 3030 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (311040).

2^2169391 is an apocalyptic number.

2169391 is a deficient number, since it is larger than the sum of its proper divisors (318929).

2169391 is an equidigital number, since it uses as much as digits as its factorization.

2169391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133.

The product of its digits is 2916, while the sum is 31.

The square root of 2169391 is about 1472.8852636916. The cubic root of 2169391 is about 129.4531466387.

The spelling of 2169391 in words is "two million, one hundred sixty-nine thousand, three hundred ninety-one".