231989059 has 2 divisors, whose sum is σ = 231989060. Its totient is φ = 231989058.

The previous prime is 231989057. The next prime is 231989081. The reversal of 231989059 is 950989132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231989059 - 2¹ = 231989057 is a prime.

Together with 231989057, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12745999 and since 231989059 and 12745999 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231989053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115994529 + 115994530.

It is an arithmetic number, because the mean of its divisors is an integer number (115994530).

Almost surely, 2^231989059 is an apocalyptic number.

231989059 is a deficient number, since it is larger than the sum of its proper divisors (1).

231989059 is an equidigital number, since it uses as much as digits as its factorization.

231989059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 231989059 is about 15231.1870515728. The cubic root of 231989059 is about 614.4537057272.

It can be divided in two parts, 2319 and 89059, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 231989059 in words is "two hundred thirty-one million, nine hundred eighty-nine thousand, fifty-nine".