128568037 has 4 divisors (see below), whose sum is σ = 138457900. Its totient is φ = 118678176.

The previous prime is 128568031. The next prime is 128568071. The reversal of 128568037 is 730865821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71927361 + 56640676 = 8481^2 + 7526^2 .

It is a cyclic number.

It is not a de Polignac number, because 128568037 - 2³ = 128568029 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 (128568031) 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, 4944912 + ... + 4944937.

It is an arithmetic number, because the mean of its divisors is an integer number (34614475).

Almost surely, 2^128568037 is an apocalyptic number.

It is an amenable number.

128568037 is a deficient number, since it is larger than the sum of its proper divisors (9889863).

128568037 is an equidigital number, since it uses as much as digits as its factorization.

128568037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889862.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 128568037 is about 11338.7846350480. The cubic root of 128568037 is about 504.7128217228.

The spelling of 128568037 in words is "one hundred twenty-eight million, five hundred sixty-eight thousand, thirty-seven".