101389 has 4 divisors (see below), whose sum is σ = 103356. Its totient is φ = 99424.

The previous prime is 101383. The next prime is 101399. The reversal of 101389 is 983101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983101 = 7 ⋅140443.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 20164 = 285^2 + 142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101389 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

101389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904 + ... + 1009.

It is an arithmetic number, because the mean of its divisors is an integer number (25839).

2¹⁰¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

101389 is a deficient number, since it is larger than the sum of its proper divisors (1967).

101389 is an equidigital number, since it uses as much as digits as its factorization.

101389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 101389 is about 318.4163940503. The cubic root of 101389 is about 46.6298064942.

The spelling of 101389 in words is "one hundred one thousand, three hundred eighty-nine".