169923013 has 4 divisors (see below), whose sum is σ = 182994028. Its totient is φ = 156852000.

The previous prime is 169922989. The next prime is 169923029. The reversal of 169923013 is 310329961.

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 11716929 + 158206084 = 3423^2 + 12578^2 .

It is a cyclic number.

It is not a de Polignac number, because 169923013 - 2²⁵ = 136368581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 169923013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169923053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535488 + ... + 6535513.

It is an arithmetic number, because the mean of its divisors is an integer number (45748507).

Almost surely, 2^169923013 is an apocalyptic number.

169923013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

169923013 is a deficient number, since it is larger than the sum of its proper divisors (13071015).

169923013 is a wasteful number, since it uses less digits than its factorization.

169923013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13071014.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 169923013 is about 13035.4521593998. The cubic root of 169923013 is about 553.8821891919.

The spelling of 169923013 in words is "one hundred sixty-nine million, nine hundred twenty-three thousand, thirteen".