128877493 has 8 divisors (see below), whose sum is σ = 139632768. Its totient is φ = 118474944.

The previous prime is 128877491. The next prime is 128877499. The reversal of 128877493 is 394778821.

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

It is a cyclic number.

It is not a de Polignac number, because 128877493 - 2¹ = 128877491 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128877491) 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, 87421 + ... + 88882.

It is an arithmetic number, because the mean of its divisors is an integer number (17454096).

Almost surely, 2^128877493 is an apocalyptic number.

It is an amenable number.

128877493 is a deficient number, since it is larger than the sum of its proper divisors (10755275).

128877493 is a wasteful number, since it uses less digits than its factorization.

128877493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176363.

The product of its digits is 677376, while the sum is 49.

The square root of 128877493 is about 11352.4223406285. The cubic root of 128877493 is about 505.1174356825.

The spelling of 128877493 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, four hundred ninety-three".