128795531 has 2 divisors, whose sum is σ = 128795532. Its totient is φ = 128795530.

The previous prime is 128795521. The next prime is 128795539. The reversal of 128795531 is 135597821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128795531 - 2¹⁰ = 128794507 is a prime.

It is a super-2 number, since 2×128795531² = 33176577611143922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128795539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64397765 + 64397766.

It is an arithmetic number, because the mean of its divisors is an integer number (64397766).

Almost surely, 2^128795531 is an apocalyptic number.

128795531 is a deficient number, since it is larger than the sum of its proper divisors (1).

128795531 is an equidigital number, since it uses as much as digits as its factorization.

128795531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 128795531 is about 11348.8118761393. The cubic root of 128795531 is about 505.0103334160.

The spelling of 128795531 in words is "one hundred twenty-eight million, seven hundred ninety-five thousand, five hundred thirty-one".