169003421 has 2 divisors, whose sum is σ = 169003422. Its totient is φ = 169003420.

The previous prime is 169003403. The next prime is 169003433. The reversal of 169003421 is 124300961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160300921 + 8702500 = 12661^2 + 2950^2 .

It is an emirp because it is prime and its reverse (124300961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169003421 - 2¹⁴ = 168987037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169003441) 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 as a sum of consecutive naturals, namely, 84501710 + 84501711.

It is an arithmetic number, because the mean of its divisors is an integer number (84501711).

Almost surely, 2^169003421 is an apocalyptic number.

It is an amenable number.

169003421 is a deficient number, since it is larger than the sum of its proper divisors (1).

169003421 is an equidigital number, since it uses as much as digits as its factorization.

169003421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 169003421 is about 13000.1315762572. The cubic root of 169003421 is about 552.8812119026.

The spelling of 169003421 in words is "one hundred sixty-nine million, three thousand, four hundred twenty-one".