1117931 has 2 divisors, whose sum is σ = 1117932. Its totient is φ = 1117930.

The previous prime is 1117913. The next prime is 1117933. The reversal of 1117931 is 1397111.

Together with previous prime (1117913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1117931 - 2⁶ = 1117867 is a prime.

It is a super-2 number, since 2×1117931² = 2499539441522, which contains 22 as substring.

Together with 1117933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1117897 and 1117906.

It is not a weakly prime, because it can be changed into another prime (1117933) 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 as a sum of consecutive naturals, namely, 558965 + 558966.

It is an arithmetic number, because the mean of its divisors is an integer number (558966).

2^1117931 is an apocalyptic number.

1117931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117931 is an equidigital number, since it uses as much as digits as its factorization.

1117931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189, while the sum is 23.

The square root of 1117931 is about 1057.3225619460. The cubic root of 1117931 is about 103.7858945816.

It can be divided in two parts, 1117 and 931, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1117931 in words is "one million, one hundred seventeen thousand, nine hundred thirty-one".