2047931 has 4 divisors (see below), whose sum is σ = 2091552. Its totient is φ = 2004312.

The previous prime is 2047919. The next prime is 2047933. The reversal of 2047931 is 1397402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1397402 = 2 ⋅698701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2047931 is a prime.

It is a super-2 number, since 2×2047931² = 8388042761522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2047931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2047933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21740 + ... + 21833.

It is an arithmetic number, because the mean of its divisors is an integer number (522888).

2^2047931 is an apocalyptic number.

2047931 is a deficient number, since it is larger than the sum of its proper divisors (43621).

2047931 is an equidigital number, since it uses as much as digits as its factorization.

2047931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43620.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2047931 is about 1431.0593977889. The cubic root of 2047931 is about 126.9906579608.

The spelling of 2047931 in words is "two million, forty-seven thousand, nine hundred thirty-one".