128230369 has 2 divisors, whose sum is σ = 128230370. Its totient is φ = 128230368.

The previous prime is 128230367. The next prime is 128230379. The reversal of 128230369 is 963032821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91929744 + 36300625 = 9588^2 + 6025^2 .

It is a cyclic number.

It is not a de Polignac number, because 128230369 - 2¹ = 128230367 is a prime.

It is a super-2 number, since 2×128230369² = 32886055067752322, which contains 22 as substring.

Together with 128230367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (128230363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64115184 + 64115185.

It is an arithmetic number, because the mean of its divisors is an integer number (64115185).

Almost surely, 2^128230369 is an apocalyptic number.

It is an amenable number.

128230369 is a deficient number, since it is larger than the sum of its proper divisors (1).

128230369 is an equidigital number, since it uses as much as digits as its factorization.

128230369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 128230369 is about 11323.8848899130. The cubic root of 128230369 is about 504.2705791263.

The spelling of 128230369 in words is "one hundred twenty-eight million, two hundred thirty thousand, three hundred sixty-nine".