170520253 has 2 divisors, whose sum is σ = 170520254. Its totient is φ = 170520252.

The previous prime is 170520227. The next prime is 170520257. The reversal of 170520253 is 352025071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149157369 + 21362884 = 12213^2 + 4622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170520253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170520257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85260126 + 85260127.

It is an arithmetic number, because the mean of its divisors is an integer number (85260127).

Almost surely, 2^170520253 is an apocalyptic number.

It is an amenable number.

170520253 is a deficient number, since it is larger than the sum of its proper divisors (1).

170520253 is an equidigital number, since it uses as much as digits as its factorization.

170520253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 170520253 is about 13058.3403616233. The cubic root of 170520253 is about 554.5303529012.

The spelling of 170520253 in words is "one hundred seventy million, five hundred twenty thousand, two hundred fifty-three".