111602989 has 8 divisors (see below), whose sum is σ = 115055640. Its totient is φ = 108173376.

The previous prime is 111602987. The next prime is 111602999. The reversal of 111602989 is 989206111.

It can be written as a sum of positive squares in 4 ways, for example, as 469225 + 111133764 = 685^2 + 10542^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111602989 - 2¹ = 111602987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111602987) 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, 4347 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (14381955).

Almost surely, 2^111602989 is an apocalyptic number.

It is an amenable number.

111602989 is a deficient number, since it is larger than the sum of its proper divisors (3452651).

111602989 is a wasteful number, since it uses less digits than its factorization.

111602989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11519.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 111602989 is about 10564.2315858750. The cubic root of 111602989 is about 481.4582231797.

The spelling of 111602989 in words is "one hundred eleven million, six hundred two thousand, nine hundred eighty-nine".