2387191 has 4 divisors (see below), whose sum is σ = 2527632. Its totient is φ = 2246752.

The previous prime is 2387183. The next prime is 2387197. The reversal of 2387191 is 1917832.

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

It is a cyclic number.

It is not a de Polignac number, because 2387191 - 2³ = 2387183 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2387197) 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, 70195 + ... + 70228.

It is an arithmetic number, because the mean of its divisors is an integer number (631908).

2^2387191 is an apocalyptic number.

2387191 is a deficient number, since it is larger than the sum of its proper divisors (140441).

2387191 is a wasteful number, since it uses less digits than its factorization.

2387191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140440.

The product of its digits is 3024, while the sum is 31.

The square root of 2387191 is about 1545.0537207489. The cubic root of 2387191 is about 133.6479770498.

The spelling of 2387191 in words is "two million, three hundred eighty-seven thousand, one hundred ninety-one".