111999707 has 2 divisors, whose sum is σ = 111999708. Its totient is φ = 111999706.

The previous prime is 111999631. The next prime is 111999709. The reversal of 111999707 is 707999111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111999707 - 2¹⁰ = 111998683 is a prime.

Together with 111999709, 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 (111999709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55999853 + 55999854.

It is an arithmetic number, because the mean of its divisors is an integer number (55999854).

Almost surely, 2^111999707 is an apocalyptic number.

111999707 is a deficient number, since it is larger than the sum of its proper divisors (1).

111999707 is an equidigital number, since it uses as much as digits as its factorization.

111999707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 44.

The square root of 111999707 is about 10582.9914013005. The cubic root of 111999707 is about 482.0280324944.

The spelling of 111999707 in words is "one hundred eleven million, nine hundred ninety-nine thousand, seven hundred seven".