169492493 has 4 divisors (see below), whose sum is σ = 171047580. Its totient is φ = 167937408.

The previous prime is 169492487. The next prime is 169492529. The reversal of 169492493 is 394294961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52809289 + 116683204 = 7267^2 + 10802^2 .

It is a cyclic number.

It is not a de Polignac number, because 169492493 - 2²⁰ = 168443917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169492423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777380 + ... + 777597.

It is an arithmetic number, because the mean of its divisors is an integer number (42761895).

Almost surely, 2^169492493 is an apocalyptic number.

It is an amenable number.

169492493 is a deficient number, since it is larger than the sum of its proper divisors (1555087).

169492493 is a wasteful number, since it uses less digits than its factorization.

169492493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555086.

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

The square root of 169492493 is about 13018.9282585012. The cubic root of 169492493 is about 553.4140182902.

The spelling of 169492493 in words is "one hundred sixty-nine million, four hundred ninety-two thousand, four hundred ninety-three".