128965683 has 64 divisors (see below), whose sum is σ = 224133120. Its totient is φ = 64022400.

The previous prime is 128965663. The next prime is 128965693. The reversal of 128965683 is 386569821.

It is a happy number.

It is not a de Polignac number, because 128965683 - 2¹² = 128961587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128965633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 675118 + ... + 675308.

It is an arithmetic number, because the mean of its divisors is an integer number (3502080).

Almost surely, 2^128965683 is an apocalyptic number.

128965683 is a deficient number, since it is larger than the sum of its proper divisors (95167437).

128965683 is a wasteful number, since it uses less digits than its factorization.

128965683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its digits is 622080, while the sum is 48.

The square root of 128965683 is about 11356.3058694278. The cubic root of 128965683 is about 505.2326255644.

The spelling of 128965683 in words is "one hundred twenty-eight million, nine hundred sixty-five thousand, six hundred eighty-three".