128458397 has 2 divisors, whose sum is σ = 128458398. Its totient is φ = 128458396.

The previous prime is 128458391. The next prime is 128458403. The reversal of 128458397 is 793854821.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (128458391) and next prime (128458403).

It can be written as a sum of positive squares in only one way, i.e., 102131236 + 26327161 = 10106^2 + 5131^2 .

It is a cyclic number.

It is not a de Polignac number, because 128458397 - 2⁶ = 128458333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128458391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64229198 + 64229199.

It is an arithmetic number, because the mean of its divisors is an integer number (64229199).

Almost surely, 2^128458397 is an apocalyptic number.

It is an amenable number.

128458397 is a deficient number, since it is larger than the sum of its proper divisors (1).

128458397 is an equidigital number, since it uses as much as digits as its factorization.

128458397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 128458397 is about 11333.9488705393. The cubic root of 128458397 is about 504.5693115822.

The spelling of 128458397 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, three hundred ninety-seven".