128148169 has 2 divisors, whose sum is σ = 128148170. Its totient is φ = 128148168.

The previous prime is 128148161. The next prime is 128148199. The reversal of 128148169 is 961841821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104284944 + 23863225 = 10212^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 128148169 - 2³ = 128148161 is a prime.

It is a super-2 number, since 2×128148169² = 32843906436105122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128148161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64074084 + 64074085.

It is an arithmetic number, because the mean of its divisors is an integer number (64074085).

Almost surely, 2^128148169 is an apocalyptic number.

It is an amenable number.

128148169 is a deficient number, since it is larger than the sum of its proper divisors (1).

128148169 is an equidigital number, since it uses as much as digits as its factorization.

128148169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 128148169 is about 11320.2548116197. The cubic root of 128148169 is about 504.1628045997.

The spelling of 128148169 in words is "one hundred twenty-eight million, one hundred forty-eight thousand, one hundred sixty-nine".