128537207 has 4 divisors (see below), whose sum is σ = 128745480. Its totient is φ = 128328936.

The previous prime is 128537183. The next prime is 128537209. The reversal of 128537207 is 702735821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702735821 = 21023 ⋅33427.

It is a cyclic number.

It is not a de Polignac number, because 128537207 - 2⁸ = 128536951 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 (128537209) 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, 103208 + ... + 104445.

It is an arithmetic number, because the mean of its divisors is an integer number (32186370).

Almost surely, 2^128537207 is an apocalyptic number.

128537207 is a deficient number, since it is larger than the sum of its proper divisors (208273).

128537207 is an equidigital number, since it uses as much as digits as its factorization.

128537207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208272.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 128537207 is about 11337.4250603918. The cubic root of 128537207 is about 504.6724759246.

The spelling of 128537207 in words is "one hundred twenty-eight million, five hundred thirty-seven thousand, two hundred seven".