111491669 has 8 divisors (see below), whose sum is σ = 114634968. Its totient is φ = 108368640.

The previous prime is 111491663. The next prime is 111491671. The reversal of 111491669 is 966194111.

It can be written as a sum of positive squares in 4 ways, for example, as 8773444 + 102718225 = 2962^2 + 10135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111491669 is a prime.

It is a super-2 number, since 2×111491669² = 24860784512811122, 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 (111491663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6449 + ... + 16265.

It is an arithmetic number, because the mean of its divisors is an integer number (14329371).

Almost surely, 2^111491669 is an apocalyptic number.

It is an amenable number.

111491669 is a deficient number, since it is larger than the sum of its proper divisors (3143299).

111491669 is an equidigital number, since it uses as much as digits as its factorization.

111491669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135.

The product of its digits is 11664, while the sum is 38.

The square root of 111491669 is about 10558.9615493191. The cubic root of 111491669 is about 481.2980907921.

The spelling of 111491669 in words is "one hundred eleven million, four hundred ninety-one thousand, six hundred sixty-nine".