2391109 has 4 divisors (see below), whose sum is σ = 2732704. Its totient is φ = 2049516.

The previous prime is 2391107. The next prime is 2391113. The reversal of 2391109 is 9011932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2391109 - 2¹ = 2391107 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 (2391107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170787 + ... + 170800.

It is an arithmetic number, because the mean of its divisors is an integer number (683176).

2^2391109 is an apocalyptic number.

It is an amenable number.

2391109 is a deficient number, since it is larger than the sum of its proper divisors (341595).

2391109 is an equidigital number, since it uses as much as digits as its factorization.

2391109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341594.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 2391109 is about 1546.3211180088. The cubic root of 2391109 is about 133.7210540907.

It can be divided in two parts, 2391 and 109, that added together give a square (2500 = 50²).

The spelling of 2391109 in words is "two million, three hundred ninety-one thousand, one hundred nine".