128935667 has 16 divisors (see below), whose sum is σ = 156323520. Its totient is φ = 103815168.

The previous prime is 128935661. The next prime is 128935673. The reversal of 128935667 is 766539821.

It is an interprime number because it is at equal distance from previous prime (128935661) and next prime (128935673).

It is a cyclic number.

It is not a de Polignac number, because 128935667 - 2¹⁰ = 128934643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128935661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115709 + ... + 116817.

It is an arithmetic number, because the mean of its divisors is an integer number (9770220).

Almost surely, 2^128935667 is an apocalyptic number.

128935667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128935667 is a deficient number, since it is larger than the sum of its proper divisors (27387853).

128935667 is a wasteful number, since it uses less digits than its factorization.

128935667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110.

The product of its digits is 544320, while the sum is 47.

The square root of 128935667 is about 11354.9842360084. The cubic root of 128935667 is about 505.1934258879.

The spelling of 128935667 in words is "one hundred twenty-eight million, nine hundred thirty-five thousand, six hundred sixty-seven".