128546977 has 12 divisors (see below), whose sum is σ = 145252224. Its totient is φ = 113496240.

The previous prime is 128546969. The next prime is 128546993. The reversal of 128546977 is 779645821.

It is not a de Polignac number, because 128546977 - 2³ = 128546969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128546977.

It is not an unprimeable number, because it can be changed into a prime (128546377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12649 + ... + 20422.

It is an arithmetic number, because the mean of its divisors is an integer number (12104352).

Almost surely, 2^128546977 is an apocalyptic number.

It is an amenable number.

128546977 is a deficient number, since it is larger than the sum of its proper divisors (16705247).

128546977 is a wasteful number, since it uses less digits than its factorization.

128546977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33120 (or 33107 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 128546977 is about 11337.8559260559. The cubic root of 128546977 is about 504.6852621709.

The spelling of 128546977 in words is "one hundred twenty-eight million, five hundred forty-six thousand, nine hundred seventy-seven".