2063891 has 4 divisors (see below), whose sum is σ = 2070000. Its totient is φ = 2057784.

The previous prime is 2063881. The next prime is 2063903. The reversal of 2063891 is 1983602.

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 2063891 - 2⁶ = 2063827 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 (2063861) 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, 2516 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (517500).

2^2063891 is an apocalyptic number.

2063891 is a deficient number, since it is larger than the sum of its proper divisors (6109).

2063891 is an equidigital number, since it uses as much as digits as its factorization.

2063891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2063891 is about 1436.6248640477. The cubic root of 2063891 is about 127.3196938751.

The spelling of 2063891 in words is "two million, sixty-three thousand, eight hundred ninety-one".