170128513 has 2 divisors, whose sum is σ = 170128514. Its totient is φ = 170128512.

The previous prime is 170128501. The next prime is 170128547. The reversal of 170128513 is 315821071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169598529 + 529984 = 13023^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 170128513 - 2⁵ = 170128481 is a prime.

It is not a weakly prime, because it can be changed into another prime (170128583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85064256 + 85064257.

It is an arithmetic number, because the mean of its divisors is an integer number (85064257).

Almost surely, 2^170128513 is an apocalyptic number.

It is an amenable number.

170128513 is a deficient number, since it is larger than the sum of its proper divisors (1).

170128513 is an equidigital number, since it uses as much as digits as its factorization.

170128513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 170128513 is about 13043.3321279495. The cubic root of 170128513 is about 554.1053822996.

Adding to 170128513 its reverse (315821071), we get a palindrome (485949584).

The spelling of 170128513 in words is "one hundred seventy million, one hundred twenty-eight thousand, five hundred thirteen".