128711663 has 2 divisors, whose sum is σ = 128711664. Its totient is φ = 128711662.

The previous prime is 128711621. The next prime is 128711699. The reversal of 128711663 is 366117821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128711663 - 2¹⁰ = 128710639 is a prime.

It is a super-3 number, since 3×128711663³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128711603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64355831 + 64355832.

It is an arithmetic number, because the mean of its divisors is an integer number (64355832).

Almost surely, 2^128711663 is an apocalyptic number.

128711663 is a deficient number, since it is larger than the sum of its proper divisors (1).

128711663 is an equidigital number, since it uses as much as digits as its factorization.

128711663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 128711663 is about 11345.1162620751. The cubic root of 128711663 is about 504.9006934750.

The spelling of 128711663 in words is "one hundred twenty-eight million, seven hundred eleven thousand, six hundred sixty-three".