128527013 has 4 divisors (see below), whose sum is σ = 134115168. Its totient is φ = 122938860.

The previous prime is 128526989. The next prime is 128527019. The reversal of 128527013 is 310725821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128527013 - 2¹² = 128522917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128527019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794043 + ... + 2794088.

It is an arithmetic number, because the mean of its divisors is an integer number (33528792).

Almost surely, 2^128527013 is an apocalyptic number.

It is an amenable number.

128527013 is a deficient number, since it is larger than the sum of its proper divisors (5588155).

128527013 is an equidigital number, since it uses as much as digits as its factorization.

128527013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588154.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128527013 is about 11336.9754784951. The cubic root of 128527013 is about 504.6591340880.

The spelling of 128527013 in words is "one hundred twenty-eight million, five hundred twenty-seven thousand, thirteen".