169438397 has 2 divisors, whose sum is σ = 169438398. Its totient is φ = 169438396.

The previous prime is 169438369. The next prime is 169438411. The reversal of 169438397 is 793834961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96609241 + 72829156 = 9829^2 + 8534^2 .

It is a cyclic number.

It is not a de Polignac number, because 169438397 - 2¹² = 169434301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169428397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84719198 + 84719199.

It is an arithmetic number, because the mean of its divisors is an integer number (84719199).

Almost surely, 2^169438397 is an apocalyptic number.

It is an amenable number.

169438397 is a deficient number, since it is larger than the sum of its proper divisors (1).

169438397 is an equidigital number, since it uses as much as digits as its factorization.

169438397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 169438397 is about 13016.8505023297. The cubic root of 169438397 is about 553.3551353081.

The spelling of 169438397 in words is "one hundred sixty-nine million, four hundred thirty-eight thousand, three hundred ninety-seven".