111271687 has 2 divisors, whose sum is σ = 111271688. Its totient is φ = 111271686.

The previous prime is 111271649. The next prime is 111271711. The reversal of 111271687 is 786172111.

It is a strong prime.

It is an emirp because it is prime and its reverse (786172111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111271687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111272687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55635843 + 55635844.

It is an arithmetic number, because the mean of its divisors is an integer number (55635844).

Almost surely, 2^111271687 is an apocalyptic number.

111271687 is a deficient number, since it is larger than the sum of its proper divisors (1).

111271687 is an equidigital number, since it uses as much as digits as its factorization.

111271687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 34.

The square root of 111271687 is about 10548.5395671628. The cubic root of 111271687 is about 480.9813358018.

The spelling of 111271687 in words is "one hundred eleven million, two hundred seventy-one thousand, six hundred eighty-seven".