128089797 has 8 divisors (see below), whose sum is σ = 186312480. Its totient is φ = 77630160.

The previous prime is 128089789. The next prime is 128089823. The reversal of 128089797 is 797980821.

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

It is not a de Polignac number, because 128089797 - 2³ = 128089789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128089777) 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, 1940722 + ... + 1940787.

It is an arithmetic number, because the mean of its divisors is an integer number (23289060).

Almost surely, 2^128089797 is an apocalyptic number.

It is an amenable number.

128089797 is a deficient number, since it is larger than the sum of its proper divisors (58222683).

128089797 is a wasteful number, since it uses less digits than its factorization.

128089797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881523.

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 128089797 is about 11317.6763074405. The cubic root of 128089797 is about 504.0862435872.

The spelling of 128089797 in words is "one hundred twenty-eight million, eighty-nine thousand, seven hundred ninety-seven".