128277297 has 8 divisors (see below), whose sum is σ = 190040480. Its totient is φ = 85518180.

The previous prime is 128277293. The next prime is 128277301. The reversal of 128277297 is 792772821.

It is an interprime number because it is at equal distance from previous prime (128277293) and next prime (128277301).

It is not a de Polignac number, because 128277297 - 2² = 128277293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128277293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375479 + ... + 2375532.

It is an arithmetic number, because the mean of its divisors is an integer number (23755060).

Almost surely, 2^128277297 is an apocalyptic number.

It is an amenable number.

128277297 is a deficient number, since it is larger than the sum of its proper divisors (61763183).

128277297 is an equidigital number, since it uses as much as digits as its factorization.

128277297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751020 (or 4751014 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 128277297 is about 11325.9567807757. The cubic root of 128277297 is about 504.3320869779.

The spelling of 128277297 in words is "one hundred twenty-eight million, two hundred seventy-seven thousand, two hundred ninety-seven".