128892077 has 2 divisors, whose sum is σ = 128892078. Its totient is φ = 128892076.

The previous prime is 128892073. The next prime is 128892089. The reversal of 128892077 is 770298821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128006596 + 885481 = 11314^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 128892077 - 2² = 128892073 is a prime.

It is a super-2 number, since 2×128892077² = 33226335026747858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128892073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64446038 + 64446039.

It is an arithmetic number, because the mean of its divisors is an integer number (64446039).

Almost surely, 2^128892077 is an apocalyptic number.

It is an amenable number.

128892077 is a deficient number, since it is larger than the sum of its proper divisors (1).

128892077 is an equidigital number, since it uses as much as digits as its factorization.

128892077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 128892077 is about 11353.0646523307. The cubic root of 128892077 is about 505.1364882847.

The spelling of 128892077 in words is "one hundred twenty-eight million, eight hundred ninety-two thousand, seventy-seven".