1111997817907 has 2 divisors, whose sum is σ = 1111997817908. Its totient is φ = 1111997817906.

The previous prime is 1111997817811. The next prime is 1111997817911. The reversal of 1111997817907 is 7097187991111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111997817907 - 2³¹ = 1109850334259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111997817107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555998908953 + 555998908954.

It is an arithmetic number, because the mean of its divisors is an integer number (555998908954).

Almost surely, 2^{1111997817907} is an apocalyptic number.

1111997817907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111997817907 is an equidigital number, since it uses as much as digits as its factorization.

1111997817907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 61.

The spelling of 1111997817907 in words is "one trillion, one hundred eleven billion, nine hundred ninety-seven million, eight hundred seventeen thousand, nine hundred seven".