1111640143 has 2 divisors, whose sum is σ = 1111640144. Its totient is φ = 1111640142.

The previous prime is 1111640141. The next prime is 1111640147. The reversal of 1111640143 is 3410461111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111640143 - 2¹ = 1111640141 is a prime.

Together with 1111640141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111640141) 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, 555820071 + 555820072.

It is an arithmetic number, because the mean of its divisors is an integer number (555820072).

Almost surely, 2^1111640143 is an apocalyptic number.

1111640143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111640143 is an equidigital number, since it uses as much as digits as its factorization.

1111640143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1111640143 is about 33341.2678673142. The cubic root of 1111640143 is about 1035.9085250773.

The spelling of 1111640143 in words is "one billion, one hundred eleven million, six hundred forty thousand, one hundred forty-three".