111357999 has 24 divisors (see below), whose sum is σ = 167029200. Its totient is φ = 71406720.

The previous prime is 111357959. The next prime is 111358061. The reversal of 111357999 is 999753111.

It is a happy number.

It is not a de Polignac number, because 111357999 - 2¹³ = 111349807 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111357919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85747 + ... + 87035.

It is an arithmetic number, because the mean of its divisors is an integer number (6959550).

Almost surely, 2^111357999 is an apocalyptic number.

111357999 is a deficient number, since it is larger than the sum of its proper divisors (55671201).

111357999 is a wasteful number, since it uses less digits than its factorization.

111357999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1652 counting only the distinct ones).

The product of its digits is 76545, while the sum is 45.

The square root of 111357999 is about 10552.6299565559. The cubic root of 111357999 is about 481.1056673148.

The spelling of 111357999 in words is "one hundred eleven million, three hundred fifty-seven thousand, nine hundred ninety-nine".