168389553 has 8 divisors (see below), whose sum is σ = 230587648. Its totient is φ = 109225584.

The previous prime is 168389537. The next prime is 168389567. The reversal of 168389553 is 355983861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168389553 - 2⁴ = 168389537 is a prime.

It is the 12977-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168389593) by changing a digit.

It is a nontrivial repunit in base 12976.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758401 + ... + 758622.

It is an arithmetic number, because the mean of its divisors is an integer number (28823456).

Almost surely, 2^168389553 is an apocalyptic number.

It is an amenable number.

168389553 is a deficient number, since it is larger than the sum of its proper divisors (62198095).

168389553 is a wasteful number, since it uses less digits than its factorization.

168389553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517063.

The product of its digits is 777600, while the sum is 48.

The square root of 168389553 is about 12976.5000288984. The cubic root of 168389553 is about 552.2109930388.

The spelling of 168389553 in words is "one hundred sixty-eight million, three hundred eighty-nine thousand, five hundred fifty-three".