111640069 has 4 divisors (see below), whose sum is σ = 111667360. Its totient is φ = 111612780.

The previous prime is 111640057. The next prime is 111640079. The reversal of 111640069 is 960046111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960046111 = 47 ⋅20426513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111640069 is a prime.

It is a super-2 number, since 2×111640069² = 24927010012649522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111640049) 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, 6129 + ... + 16150.

It is an arithmetic number, because the mean of its divisors is an integer number (27916840).

Almost surely, 2^111640069 is an apocalyptic number.

It is an amenable number.

111640069 is a deficient number, since it is larger than the sum of its proper divisors (27291).

111640069 is an equidigital number, since it uses as much as digits as its factorization.

111640069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27290.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 111640069 is about 10565.9864186928. The cubic root of 111640069 is about 481.5115386399.

The spelling of 111640069 in words is "one hundred eleven million, six hundred forty thousand, sixty-nine".