168406253 has 16 divisors (see below), whose sum is σ = 187246080. Its totient is φ = 150735024.

The previous prime is 168406247. The next prime is 168406313. The reversal of 168406253 is 352604861.

168406253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168406253 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 (168406753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33950 + ... + 38592.

It is an arithmetic number, because the mean of its divisors is an integer number (11702880).

Almost surely, 2^168406253 is an apocalyptic number.

It is an amenable number.

168406253 is a deficient number, since it is larger than the sum of its proper divisors (18839827).

168406253 is a wasteful number, since it uses less digits than its factorization.

168406253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 168406253 is about 12977.1434838334. The cubic root of 168406253 is about 552.2292475734.

The spelling of 168406253 in words is "one hundred sixty-eight million, four hundred six thousand, two hundred fifty-three".