168720535 has 16 divisors (see below), whose sum is σ = 208236672. Its totient is φ = 131155200.

The previous prime is 168720527. The next prime is 168720547. The reversal of 168720535 is 535027861.

168720535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168720535 - 2³ = 168720527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168720494 and 168720503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54037 + ... + 57073.

It is an arithmetic number, because the mean of its divisors is an integer number (13014792).

Almost surely, 2^168720535 is an apocalyptic number.

168720535 is a deficient number, since it is larger than the sum of its proper divisors (39516137).

168720535 is a wasteful number, since it uses less digits than its factorization.

168720535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 168720535 is about 12989.2468988775. The cubic root of 168720535 is about 552.5725599645.

It can be divided in two parts, 1687 and 20535, that added together give a palindrome (22222).

The spelling of 168720535 in words is "one hundred sixty-eight million, seven hundred twenty thousand, five hundred thirty-five".