111685601 has 2 divisors, whose sum is σ = 111685602. Its totient is φ = 111685600.

The previous prime is 111685559. The next prime is 111685619. The reversal of 111685601 is 106586111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89113600 + 22572001 = 9440^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 111685601 - 2⁶ = 111685537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111685621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55842800 + 55842801.

It is an arithmetic number, because the mean of its divisors is an integer number (55842801).

Almost surely, 2^111685601 is an apocalyptic number.

It is an amenable number.

111685601 is a deficient number, since it is larger than the sum of its proper divisors (1).

111685601 is an equidigital number, since it uses as much as digits as its factorization.

111685601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 111685601 is about 10568.1408487964. The cubic root of 111685601 is about 481.5769906581.

The spelling of 111685601 in words is "one hundred eleven million, six hundred eighty-five thousand, six hundred one".