2397891 has 8 divisors (see below), whose sum is σ = 3226960. Its totient is φ = 1583712.

The previous prime is 2397869. The next prime is 2397907. The reversal of 2397891 is 1987932.

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

It is not a de Polignac number, because 2397891 - 2⁶ = 2397827 is a prime.

It is a Duffinian number.

2397891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2397821) 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, 3340 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (403370).

2^2397891 is an apocalyptic number.

2397891 is a deficient number, since it is larger than the sum of its proper divisors (829069).

2397891 is a wasteful number, since it uses less digits than its factorization.

2397891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445.

The product of its digits is 27216, while the sum is 39.

The square root of 2397891 is about 1548.5125120579. The cubic root of 2397891 is about 133.8473609097.

The spelling of 2397891 in words is "two million, three hundred ninety-seven thousand, eight hundred ninety-one".