169897613 has 2 divisors, whose sum is σ = 169897614. Its totient is φ = 169897612.

The previous prime is 169897603. The next prime is 169897667. The reversal of 169897613 is 316798961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163277284 + 6620329 = 12778^2 + 2573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169897613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169897603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84948806 + 84948807.

It is an arithmetic number, because the mean of its divisors is an integer number (84948807).

Almost surely, 2^169897613 is an apocalyptic number.

It is an amenable number.

169897613 is a deficient number, since it is larger than the sum of its proper divisors (1).

169897613 is an equidigital number, since it uses as much as digits as its factorization.

169897613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 169897613 is about 13034.4778568227. The cubic root of 169897613 is about 553.8545898134.

The spelling of 169897613 in words is "one hundred sixty-nine million, eight hundred ninety-seven thousand, six hundred thirteen".