102110989 has 4 divisors (see below), whose sum is σ = 102131200. Its totient is φ = 102090780.

The previous prime is 102110971. The next prime is 102111029. The reversal of 102110989 is 989011201.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102110989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102110989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102110089) 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, 5044 + ... + 15154.

It is an arithmetic number, because the mean of its divisors is an integer number (25532800).

Almost surely, 2^102110989 is an apocalyptic number.

It is an amenable number.

102110989 is a deficient number, since it is larger than the sum of its proper divisors (20211).

102110989 is a wasteful number, since it uses less digits than its factorization.

102110989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20210.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 102110989 is about 10104.9982187035. The cubic root of 102110989 is about 467.4022810428.

The spelling of 102110989 in words is "one hundred two million, one hundred ten thousand, nine hundred eighty-nine".