111355691 has 2 divisors, whose sum is σ = 111355692. Its totient is φ = 111355690.

The previous prime is 111355687. The next prime is 111355693. The reversal of 111355691 is 196553111.

It is a strong prime.

It is an emirp because it is prime and its reverse (196553111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111355691 - 2² = 111355687 is a prime.

It is a Sophie Germain prime.

Together with 111355693, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6376370 and since 111355691 and 6376370 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (111355693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55677845 + 55677846.

It is an arithmetic number, because the mean of its divisors is an integer number (55677846).

Almost surely, 2^111355691 is an apocalyptic number.

111355691 is a deficient number, since it is larger than the sum of its proper divisors (1).

111355691 is an equidigital number, since it uses as much as digits as its factorization.

111355691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 32.

The square root of 111355691 is about 10552.5205993639. The cubic root of 111355691 is about 481.1023435017.

The spelling of 111355691 in words is "one hundred eleven million, three hundred fifty-five thousand, six hundred ninety-one".