1111993931 has 2 divisors, whose sum is σ = 1111993932. Its totient is φ = 1111993930.

The previous prime is 1111993907. The next prime is 1111993933. The reversal of 1111993931 is 1393991111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111993931 - 2¹⁸ = 1111731787 is a prime.

It is a super-2 number, since 2×1111993931² = 2473061005161665522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1111993933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1111993933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555996965 + 555996966.

It is an arithmetic number, because the mean of its divisors is an integer number (555996966).

Almost surely, 2^1111993931 is an apocalyptic number.

1111993931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111993931 is an equidigital number, since it uses as much as digits as its factorization.

1111993931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561, while the sum is 38.

The square root of 1111993931 is about 33346.5730023341. The cubic root of 1111993931 is about 1036.0184086983.

The spelling of 1111993931 in words is "one billion, one hundred eleven million, nine hundred ninety-three thousand, nine hundred thirty-one".