170137213 has 4 divisors (see below), whose sum is σ = 170168380. Its totient is φ = 170106048.

The previous prime is 170137199. The next prime is 170137217. The reversal of 170137213 is 312731071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312731071 = 3659 ⋅85469.

It can be written as a sum of positive squares in 2 ways, for example, as 151240804 + 18896409 = 12298^2 + 4347^2 .

It is a cyclic number.

It is not a de Polignac number, because 170137213 - 2¹⁷ = 170006141 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 (170137217) 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, 4998 + ... + 19111.

It is an arithmetic number, because the mean of its divisors is an integer number (42542095).

Almost surely, 2^170137213 is an apocalyptic number.

It is an amenable number.

170137213 is a deficient number, since it is larger than the sum of its proper divisors (31167).

170137213 is an equidigital number, since it uses as much as digits as its factorization.

170137213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31166.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 170137213 is about 13043.6656274224. The cubic root of 170137213 is about 554.1148273843.

Adding to 170137213 its reverse (312731071), we get a palindrome (482868284).

The spelling of 170137213 in words is "one hundred seventy million, one hundred thirty-seven thousand, two hundred thirteen".