1018931 has 2 divisors, whose sum is σ = 1018932. Its totient is φ = 1018930.

The previous prime is 1018907. The next prime is 1018937. The reversal of 1018931 is 1398101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018931 is a prime.

It is a super-2 number, since 2×1018931² = 2076440765522, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1018897 and 1018906.

It is not a weakly prime, because it can be changed into another prime (1018937) 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, 509465 + 509466.

It is an arithmetic number, because the mean of its divisors is an integer number (509466).

2^1018931 is an apocalyptic number.

1018931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018931 is an equidigital number, since it uses as much as digits as its factorization.

1018931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1018931 is about 1009.4211212373. The cubic root of 1018931 is about 100.6270926612.

The spelling of 1018931 in words is "one million, eighteen thousand, nine hundred thirty-one".