2397881 has 4 divisors (see below), whose sum is σ = 2475264. Its totient is φ = 2320500.

The previous prime is 2397869. The next prime is 2397907. The reversal of 2397881 is 1887932.

2397881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 2397881 - 2¹⁴ = 2381497 is a prime.

It is a super-2 number, since 2×2397881² = 11499666580322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2397821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38645 + ... + 38706.

It is an arithmetic number, because the mean of its divisors is an integer number (618816).

2^2397881 is an apocalyptic number.

It is an amenable number.

2397881 is a deficient number, since it is larger than the sum of its proper divisors (77383).

2397881 is an equidigital number, since it uses as much as digits as its factorization.

2397881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77382.

The product of its digits is 24192, while the sum is 38.

The square root of 2397881 is about 1548.5092831494. The cubic root of 2397881 is about 133.8471748468.

The spelling of 2397881 in words is "two million, three hundred ninety-seven thousand, eight hundred eighty-one".