169438369 has 2 divisors, whose sum is σ = 169438370. Its totient is φ = 169438368.

The previous prime is 169438279. The next prime is 169438397. The reversal of 169438369 is 963834961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144288144 + 25150225 = 12012^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 169438369 - 2¹¹ = 169436321 is a prime.

It is a super-2 number, since 2×169438369² = 57418721778760322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (169438169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84719184 + 84719185.

It is an arithmetic number, because the mean of its divisors is an integer number (84719185).

Almost surely, 2^169438369 is an apocalyptic number.

It is an amenable number.

169438369 is a deficient number, since it is larger than the sum of its proper divisors (1).

169438369 is an equidigital number, since it uses as much as digits as its factorization.

169438369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 169438369 is about 13016.8494268006. The cubic root of 169438369 is about 553.3551048271.

The spelling of 169438369 in words is "one hundred sixty-nine million, four hundred thirty-eight thousand, three hundred sixty-nine".