156389 has 4 divisors (see below), whose sum is σ = 164640. Its totient is φ = 148140.

The previous prime is 156371. The next prime is 156419. The reversal of 156389 is 983651.

156389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 156389 - 2¹² = 152293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156319) 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, 4097 + ... + 4134.

It is an arithmetic number, because the mean of its divisors is an integer number (41160).

2¹⁵⁶³⁸⁹ is an apocalyptic number.

156389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

156389 is a deficient number, since it is larger than the sum of its proper divisors (8251).

156389 is an equidigital number, since it uses as much as digits as its factorization.

156389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250.

The product of its digits is 6480, while the sum is 32.

The square root of 156389 is about 395.4604910734. The cubic root of 156389 is about 53.8768340595.

It can be divided in two parts, 156 and 389, that added together give a palindrome (545).

The spelling of 156389 in words is "one hundred fifty-six thousand, three hundred eighty-nine".