231023389 has 2 divisors, whose sum is σ = 231023390. Its totient is φ = 231023388.

The previous prime is 231023369. The next prime is 231023399. The reversal of 231023389 is 983320132.

231023389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205348900 + 25674489 = 14330^2 + 5067^2 .

It is a cyclic number.

It is not a de Polignac number, because 231023389 - 2¹⁵ = 230990621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231023389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231023369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115511694 + 115511695.

It is an arithmetic number, because the mean of its divisors is an integer number (115511695).

Almost surely, 2^231023389 is an apocalyptic number.

It is an amenable number.

231023389 is a deficient number, since it is larger than the sum of its proper divisors (1).

231023389 is an equidigital number, since it uses as much as digits as its factorization.

231023389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 231023389 is about 15199.4535757046. The cubic root of 231023389 is about 613.5999517881.

The spelling of 231023389 in words is "two hundred thirty-one million, twenty-three thousand, three hundred eighty-nine".