128812699 has 6 divisors (see below), whose sum is σ = 130039364. Its totient is φ = 127597500.

The previous prime is 128812687. The next prime is 128812703. The reversal of 128812699 is 996218821.

It is a de Polignac number, because none of the positive numbers 2^k-128812699 is a prime.

It is a super-2 number, since 2×128812699² = 33185422847329202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128812669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5824 + ... + 17074.

Almost surely, 2^128812699 is an apocalyptic number.

128812699 is a deficient number, since it is larger than the sum of its proper divisors (1226665).

128812699 is an equidigital number, since it uses as much as digits as its factorization.

128812699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11465 (or 11358 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 128812699 is about 11349.5682296729. The cubic root of 128812699 is about 505.0327711309.

It can be divided in two parts, 1288126 and 99, that added together give a square (1288225 = 1135²).

The spelling of 128812699 in words is "one hundred twenty-eight million, eight hundred twelve thousand, six hundred ninety-nine".