111640357 has 4 divisors (see below), whose sum is σ = 111670636. Its totient is φ = 111610080.

The previous prime is 111640337. The next prime is 111640363. The reversal of 111640357 is 753046111.

It is a Cunningham number, because it is equal to 10566²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59814756 + 51825601 = 7734^2 + 7199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111640357 is a prime.

It is a super-2 number, since 2×111640357² = 24927138622174898, 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 (111640327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8694 + ... + 17287.

It is an arithmetic number, because the mean of its divisors is an integer number (27917659).

Almost surely, 2^111640357 is an apocalyptic number.

It is an amenable number.

111640357 is a deficient number, since it is larger than the sum of its proper divisors (30279).

111640357 is an equidigital number, since it uses as much as digits as its factorization.

111640357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30278.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 111640357 is about 10566.0000473216. Note that the first 4 decimals coincide. The cubic root of 111640357 is about 481.5119526943.

Adding to 111640357 its reverse (753046111), we get a palindrome (864686468).

The spelling of 111640357 in words is "one hundred eleven million, six hundred forty thousand, three hundred fifty-seven".