107989 has 4 divisors (see below), whose sum is σ = 123424. Its totient is φ = 92556.

The previous prime is 107981. The next prime is 107999. The reversal of 107989 is 989701.

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: 989701 = 977 ⋅1013.

It is a cyclic number.

It is not a de Polignac number, because 107989 - 2³ = 107981 is a prime.

107989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107981) 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, 7707 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (30856).

2¹⁰⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

107989 is a deficient number, since it is larger than the sum of its proper divisors (15435).

107989 is an equidigital number, since it uses as much as digits as its factorization.

107989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15434.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 107989 is about 328.6167981099. The cubic root of 107989 is about 47.6204147068.

The spelling of 107989 in words is "one hundred seven thousand, nine hundred eighty-nine".