128775679 has 2 divisors, whose sum is σ = 128775680. Its totient is φ = 128775678.

The previous prime is 128775671. The next prime is 128775683. The reversal of 128775679 is 976577821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128775679 - 2³ = 128775671 is a prime.

It is a super-2 number, since 2×128775679² = 33166351003822082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128775671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64387839 + 64387840.

It is an arithmetic number, because the mean of its divisors is an integer number (64387840).

Almost surely, 2^128775679 is an apocalyptic number.

128775679 is a deficient number, since it is larger than the sum of its proper divisors (1).

128775679 is an equidigital number, since it uses as much as digits as its factorization.

128775679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 52.

The square root of 128775679 is about 11347.9372134322. The cubic root of 128775679 is about 504.9843853617.

The spelling of 128775679 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, six hundred seventy-nine".