128481469 has 2 divisors, whose sum is σ = 128481470. Its totient is φ = 128481468.

The previous prime is 128481403. The next prime is 128481481. The reversal of 128481469 is 964184821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 9998244 = 10885^2 + 3162^2 .

It is an emirp because it is prime and its reverse (964184821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128481469 - 2⁷ = 128481341 is a prime.

It is a super-2 number, since 2×128481469² = 33014975752795922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128481499) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64240734 + 64240735.

It is an arithmetic number, because the mean of its divisors is an integer number (64240735).

Almost surely, 2^128481469 is an apocalyptic number.

It is an amenable number.

128481469 is a deficient number, since it is larger than the sum of its proper divisors (1).

128481469 is an equidigital number, since it uses as much as digits as its factorization.

128481469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 43.

The square root of 128481469 is about 11334.9666519139. The cubic root of 128481469 is about 504.5995177982.

The spelling of 128481469 in words is "one hundred twenty-eight million, four hundred eighty-one thousand, four hundred sixty-nine".