169421663 has 2 divisors, whose sum is σ = 169421664. Its totient is φ = 169421662.

The previous prime is 169421653. The next prime is 169421669. The reversal of 169421663 is 366124961.

It is a strong prime.

It is an emirp because it is prime and its reverse (366124961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169421663 - 2⁴ = 169421647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169421669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84710831 + 84710832.

It is an arithmetic number, because the mean of its divisors is an integer number (84710832).

Almost surely, 2^169421663 is an apocalyptic number.

169421663 is a deficient number, since it is larger than the sum of its proper divisors (1).

169421663 is an equidigital number, since it uses as much as digits as its factorization.

169421663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 169421663 is about 13016.2077042432. The cubic root of 169421663 is about 553.3369179700.

The spelling of 169421663 in words is "one hundred sixty-nine million, four hundred twenty-one thousand, six hundred sixty-three".