169499423 has 2 divisors, whose sum is σ = 169499424. Its totient is φ = 169499422.

The previous prime is 169499417. The next prime is 169499497. The reversal of 169499423 is 324994961.

It is a weak prime.

It is an emirp because it is prime and its reverse (324994961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169499423 - 2²⁶ = 102390559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169499023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84749711 + 84749712.

It is an arithmetic number, because the mean of its divisors is an integer number (84749712).

Almost surely, 2^169499423 is an apocalyptic number.

169499423 is a deficient number, since it is larger than the sum of its proper divisors (1).

169499423 is an equidigital number, since it uses as much as digits as its factorization.

169499423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 169499423 is about 13019.1944067212. The cubic root of 169499423 is about 553.4215606240.

The spelling of 169499423 in words is "one hundred sixty-nine million, four hundred ninety-nine thousand, four hundred twenty-three".