237989 has 4 divisors (see below), whose sum is σ = 239040. Its totient is φ = 236940.

The previous prime is 237977. The next prime is 237997. The reversal of 237989 is 989732.

237989 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 237989 - 2⁴ = 237973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (237929) 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, 29 + ... + 690.

It is an arithmetic number, because the mean of its divisors is an integer number (59760).

2²³⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

237989 is a deficient number, since it is larger than the sum of its proper divisors (1051).

237989 is an equidigital number, since it uses as much as digits as its factorization.

237989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 27216, while the sum is 38.

The square root of 237989 is about 487.8411626749. The cubic root of 237989 is about 61.9705895890.

The spelling of 237989 in words is "two hundred thirty-seven thousand, nine hundred eighty-nine".