1111640141 has 2 divisors, whose sum is σ = 1111640142. Its totient is φ = 1111640140.

The previous prime is 1111640137. The next prime is 1111640143. The reversal of 1111640141 is 1410461111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980629225 + 131010916 = 31315^2 + 11446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111640141 - 2² = 1111640137 is a prime.

Together with 1111640143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111640143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555820070 + 555820071.

It is an arithmetic number, because the mean of its divisors is an integer number (555820071).

Almost surely, 2^1111640141 is an apocalyptic number.

It is an amenable number.

1111640141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111640141 is an equidigital number, since it uses as much as digits as its factorization.

1111640141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 1111640141 is about 33341.2678373214. The cubic root of 1111640141 is about 1035.9085244560.

The spelling of 1111640141 in words is "one billion, one hundred eleven million, six hundred forty thousand, one hundred forty-one".