169728623 has 2 divisors, whose sum is σ = 169728624. Its totient is φ = 169728622.

The previous prime is 169728571. The next prime is 169728641. The reversal of 169728623 is 326827961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 169728623 - 2⁸ = 169728367 is a prime.

It is a super-2 number, since 2×169728623² = 57615610930952258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169728673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84864311 + 84864312.

It is an arithmetic number, because the mean of its divisors is an integer number (84864312).

Almost surely, 2^169728623 is an apocalyptic number.

169728623 is a deficient number, since it is larger than the sum of its proper divisors (1).

169728623 is an equidigital number, since it uses as much as digits as its factorization.

169728623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 169728623 is about 13027.9938209995. The cubic root of 169728623 is about 553.6708969516.

The spelling of 169728623 in words is "one hundred sixty-nine million, seven hundred twenty-eight thousand, six hundred twenty-three".