111669601 has 4 divisors (see below), whose sum is σ = 112820932. Its totient is φ = 110518272.

The previous prime is 111669599. The next prime is 111669619. The reversal of 111669601 is 106966111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106966111 = 7 ⋅15280873.

It can be written as a sum of positive squares in 2 ways, for example, as 84640000 + 27029601 = 9200^2 + 5199^2 .

It is a cyclic number.

It is not a de Polignac number, because 111669601 - 2¹ = 111669599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111669641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575520 + ... + 575713.

It is an arithmetic number, because the mean of its divisors is an integer number (28205233).

Almost surely, 2^111669601 is an apocalyptic number.

It is an amenable number.

111669601 is a deficient number, since it is larger than the sum of its proper divisors (1151331).

111669601 is an equidigital number, since it uses as much as digits as its factorization.

111669601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151330.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 111669601 is about 10567.3838295010. The cubic root of 111669601 is about 481.5539927671.

The spelling of 111669601 in words is "one hundred eleven million, six hundred sixty-nine thousand, six hundred one".