128234969 has 2 divisors, whose sum is σ = 128234970. Its totient is φ = 128234968.

The previous prime is 128234963. The next prime is 128234989. The reversal of 128234969 is 969432821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70778569 + 57456400 = 8413^2 + 7580^2 .

It is a cyclic number.

It is not a de Polignac number, because 128234969 - 2¹² = 128230873 is a prime.

It is a super-2 number, since 2×128234969² = 32888414548861922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128234963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64117484 + 64117485.

It is an arithmetic number, because the mean of its divisors is an integer number (64117485).

Almost surely, 2^128234969 is an apocalyptic number.

It is an amenable number.

128234969 is a deficient number, since it is larger than the sum of its proper divisors (1).

128234969 is an equidigital number, since it uses as much as digits as its factorization.

128234969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 128234969 is about 11324.0879985984. The cubic root of 128234969 is about 504.2766089432.

The spelling of 128234969 in words is "one hundred twenty-eight million, two hundred thirty-four thousand, nine hundred sixty-nine".