128903013 has 6 divisors (see below), whose sum is σ = 186193254. Its totient is φ = 85935336.

The previous prime is 128902997. The next prime is 128903041. The reversal of 128903013 is 310309821.

It can be written as a sum of positive squares in only one way, i.e., 92505924 + 36397089 = 9618^2 + 6033^2 .

It is not a de Polignac number, because 128903013 - 2⁴ = 128902997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128903513) 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, 7161270 + ... + 7161287.

It is an arithmetic number, because the mean of its divisors is an integer number (31032209).

Almost surely, 2^128903013 is an apocalyptic number.

It is an amenable number.

128903013 is a deficient number, since it is larger than the sum of its proper divisors (57290241).

128903013 is a wasteful number, since it uses less digits than its factorization.

128903013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322563 (or 14322560 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 128903013 is about 11353.5462741824. The cubic root of 128903013 is about 505.1507741807.

The spelling of 128903013 in words is "one hundred twenty-eight million, nine hundred three thousand, thirteen".