128164513 has 4 divisors (see below), whose sum is σ = 135703620. Its totient is φ = 120625408.

The previous prime is 128164499. The next prime is 128164529. The reversal of 128164513 is 315461821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315461821 = 223 ⋅1414627.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 68442529 = 7728^2 + 8273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128164513 is a prime.

It is a super-2 number, since 2×128164513² = 32852284785054338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128164573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3769528 + ... + 3769561.

It is an arithmetic number, because the mean of its divisors is an integer number (33925905).

Almost surely, 2^128164513 is an apocalyptic number.

It is an amenable number.

128164513 is a deficient number, since it is larger than the sum of its proper divisors (7539107).

128164513 is an equidigital number, since it uses as much as digits as its factorization.

128164513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539106.

The product of its digits is 5760, while the sum is 31.

The square root of 128164513 is about 11320.9766804812. The cubic root of 128164513 is about 504.1842373070.

The spelling of 128164513 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, five hundred thirteen".