128516943 has 8 divisors (see below), whose sum is σ = 171411328. Its totient is φ = 85650264.

The previous prime is 128516933. The next prime is 128516953. The reversal of 128516943 is 349615821.

It is an interprime number because it is at equal distance from previous prime (128516933) and next prime (128516953).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128516943 - 2²¹ = 126419791 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 (128516933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9396 + ... + 18582.

It is an arithmetic number, because the mean of its divisors is an integer number (21426416).

Almost surely, 2^128516943 is an apocalyptic number.

128516943 is a deficient number, since it is larger than the sum of its proper divisors (42894385).

128516943 is an equidigital number, since it uses as much as digits as its factorization.

128516943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13853.

The product of its digits is 51840, while the sum is 39.

The square root of 128516943 is about 11336.5313478153. The cubic root of 128516943 is about 504.6459538491.

The spelling of 128516943 in words is "one hundred twenty-eight million, five hundred sixteen thousand, nine hundred forty-three".