231380837 has 2 divisors, whose sum is σ = 231380838. Its totient is φ = 231380836.

The previous prime is 231380833. The next prime is 231380839. The reversal of 231380837 is 738083132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200533921 + 30846916 = 14161^2 + 5554^2 .

It is a cyclic number.

It is not a de Polignac number, because 231380837 - 2² = 231380833 is a prime.

Together with 231380839, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 231380797 and 231380806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231380833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115690418 + 115690419.

It is an arithmetic number, because the mean of its divisors is an integer number (115690419).

Almost surely, 2^231380837 is an apocalyptic number.

It is an amenable number.

231380837 is a deficient number, since it is larger than the sum of its proper divisors (1).

231380837 is an equidigital number, since it uses as much as digits as its factorization.

231380837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 231380837 is about 15211.2076114949. The cubic root of 231380837 is about 613.9162502880.

The spelling of 231380837 in words is "two hundred thirty-one million, three hundred eighty thousand, eight hundred thirty-seven".