1111000091909 has 2 divisors, whose sum is σ = 1111000091910. Its totient is φ = 1111000091908.

The previous prime is 1111000091863. The next prime is 1111000091917. The reversal of 1111000091909 is 9091900001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783009074884 + 327991017025 = 884878^2 + 572705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111000091909 - 2²⁸ = 1110731656453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111000091939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555500045954 + 555500045955.

It is an arithmetic number, because the mean of its divisors is an integer number (555500045955).

Almost surely, 2^{1111000091909} is an apocalyptic number.

It is an amenable number.

1111000091909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111000091909 is an equidigital number, since it uses as much as digits as its factorization.

1111000091909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 1111000091909 in words is "one trillion, one hundred eleven billion, ninety-one thousand, nine hundred nine".