168039253 has 4 divisors (see below), whose sum is σ = 173833740. Its totient is φ = 162244768.

The previous prime is 168039233. The next prime is 168039299. The reversal of 168039253 is 352930861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352930861 = 59 ⋅5981879.

It can be written as a sum of positive squares in 2 ways, for example, as 110628324 + 57410929 = 10518^2 + 7577^2 .

It is a cyclic number.

It is not a de Polignac number, because 168039253 - 2²⁵ = 134484821 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 (168039233) 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, 2897200 + ... + 2897257.

It is an arithmetic number, because the mean of its divisors is an integer number (43458435).

Almost surely, 2^168039253 is an apocalyptic number.

It is an amenable number.

168039253 is a deficient number, since it is larger than the sum of its proper divisors (5794487).

168039253 is an equidigital number, since it uses as much as digits as its factorization.

168039253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794486.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 168039253 is about 12962.9955257263. The cubic root of 168039253 is about 551.8278065530.

The spelling of 168039253 in words is "one hundred sixty-eight million, thirty-nine thousand, two hundred fifty-three".