128791607 has 8 divisors (see below), whose sum is σ = 147337632. Its totient is φ = 110282400.

The previous prime is 128791601. The next prime is 128791613. The reversal of 128791607 is 706197821.

It is an interprime number because it is at equal distance from previous prime (128791601) and next prime (128791613).

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 128791607 - 2⁶ = 128791543 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 (128791601) 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, 1244 + ... + 16097.

It is an arithmetic number, because the mean of its divisors is an integer number (18417204).

Almost surely, 2^128791607 is an apocalyptic number.

128791607 is a deficient number, since it is larger than the sum of its proper divisors (18546025).

128791607 is a wasteful number, since it uses less digits than its factorization.

128791607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18409.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 128791607 is about 11348.6389932890. The cubic root of 128791607 is about 505.0052046649.

The spelling of 128791607 in words is "one hundred twenty-eight million, seven hundred ninety-one thousand, six hundred seven".