128162893 has 4 divisors (see below), whose sum is σ = 130075840. Its totient is φ = 126249948.

The previous prime is 128162887. The next prime is 128162929. The reversal of 128162893 is 398261821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128162893 - 2⁹ = 128162381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128162863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956373 + ... + 956506.

It is an arithmetic number, because the mean of its divisors is an integer number (32518960).

Almost surely, 2^128162893 is an apocalyptic number.

It is an amenable number.

128162893 is a deficient number, since it is larger than the sum of its proper divisors (1912947).

128162893 is an equidigital number, since it uses as much as digits as its factorization.

128162893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912946.

The product of its digits is 41472, while the sum is 40.

The square root of 128162893 is about 11320.9051316580. The cubic root of 128162893 is about 504.1821130011.

The spelling of 128162893 in words is "one hundred twenty-eight million, one hundred sixty-two thousand, eight hundred ninety-three".