169609013 has 4 divisors (see below), whose sum is σ = 193838880. Its totient is φ = 145379148.

The previous prime is 169609007. The next prime is 169609019. The reversal of 169609013 is 310906961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310906961 = 83 ⋅3745867.

It is an interprime number because it is at equal distance from previous prime (169609007) and next prime (169609019).

It is a cyclic number.

It is not a de Polignac number, because 169609013 - 2¹² = 169604917 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 (169609019) 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, 12114923 + ... + 12114936.

It is an arithmetic number, because the mean of its divisors is an integer number (48459720).

Almost surely, 2^169609013 is an apocalyptic number.

It is an amenable number.

169609013 is a deficient number, since it is larger than the sum of its proper divisors (24229867).

169609013 is an equidigital number, since it uses as much as digits as its factorization.

169609013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24229866.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 169609013 is about 13023.4025124005. The cubic root of 169609013 is about 553.5408066593.

The spelling of 169609013 in words is "one hundred sixty-nine million, six hundred nine thousand, thirteen".