168906253 has 4 divisors (see below), whose sum is σ = 168946048. Its totient is φ = 168866460.

The previous prime is 168906229. The next prime is 168906281. The reversal of 168906253 is 352609861.

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.

It is a cyclic number.

It is not a de Polignac number, because 168906253 - 2⁹ = 168905741 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 (168906853) 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, 12651 + ... + 22312.

It is an arithmetic number, because the mean of its divisors is an integer number (42236512).

Almost surely, 2^168906253 is an apocalyptic number.

It is an amenable number.

168906253 is a deficient number, since it is larger than the sum of its proper divisors (39795).

168906253 is an equidigital number, since it uses as much as digits as its factorization.

168906253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39794.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 168906253 is about 12996.3938459867. The cubic root of 168906253 is about 552.7752324686.

The spelling of 168906253 in words is "one hundred sixty-eight million, nine hundred six thousand, two hundred fifty-three".