128903867 has 4 divisors (see below), whose sum is σ = 129005160. Its totient is φ = 128802576.

The previous prime is 128903861. The next prime is 128903881. The reversal of 128903867 is 768309821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768309821 = 19 ⋅40437359.

It is a cyclic number.

It is not a de Polignac number, because 128903867 - 2⁴ = 128903851 is a prime.

It is a Duffinian number.

128903867 is a modest number, since divided by 3867 gives 1289 as remainder.

It is not an unprimeable number, because it can be changed into a prime (128903861) 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 3 ways as a sum of consecutive naturals, for example, 48713 + ... + 51290.

It is an arithmetic number, because the mean of its divisors is an integer number (32251290).

Almost surely, 2^128903867 is an apocalyptic number.

128903867 is a deficient number, since it is larger than the sum of its proper divisors (101293).

128903867 is a wasteful number, since it uses less digits than its factorization.

128903867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101292.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 128903867 is about 11353.5838835145. The cubic root of 128903867 is about 505.1518897424.

The spelling of 128903867 in words is "one hundred twenty-eight million, nine hundred three thousand, eight hundred sixty-seven".