128937567 has 16 divisors (see below), whose sum is σ = 194014080. Its totient is φ = 75448800.

The previous prime is 128937493. The next prime is 128937577. The reversal of 128937567 is 765739821.

It is not a de Polignac number, because 128937567 - 2¹⁸ = 128675423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128937577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66409 + ... + 68322.

It is an arithmetic number, because the mean of its divisors is an integer number (12125880).

Almost surely, 2^128937567 is an apocalyptic number.

128937567 is a deficient number, since it is larger than the sum of its proper divisors (65076513).

128937567 is a wasteful number, since it uses less digits than its factorization.

128937567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134774.

The product of its digits is 635040, while the sum is 48.

The square root of 128937567 is about 11355.0678994007. The cubic root of 128937567 is about 505.1959073911.

The spelling of 128937567 in words is "one hundred twenty-eight million, nine hundred thirty-seven thousand, five hundred sixty-seven".