128096977 has 2 divisors, whose sum is σ = 128096978. Its totient is φ = 128096976.

The previous prime is 128096951. The next prime is 128096981. The reversal of 128096977 is 779690821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 5308416 = 11081^2 + 2304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128096977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128096977.

It is not a weakly prime, because it can be changed into another prime (128096077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64048488 + 64048489.

It is an arithmetic number, because the mean of its divisors is an integer number (64048489).

Almost surely, 2^128096977 is an apocalyptic number.

It is an amenable number.

128096977 is a deficient number, since it is larger than the sum of its proper divisors (1).

128096977 is an equidigital number, since it uses as much as digits as its factorization.

128096977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 128096977 is about 11317.9935059179. The cubic root of 128096977 is about 504.0956621662.

The spelling of 128096977 in words is "one hundred twenty-eight million, ninety-six thousand, nine hundred seventy-seven".