172535668 has 12 divisors (see below), whose sum is σ = 303683940. Its totient is φ = 85768832.

The previous prime is 172535641. The next prime is 172535683. The reversal of 172535668 is 866535271.

172535668 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 135908964 + 36626704 = 11658^2 + 6052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123973 + ... + 125356.

It is an arithmetic number, because the mean of its divisors is an integer number (25306995).

Almost surely, 2^172535668 is an apocalyptic number.

It is an amenable number.

172535668 is a deficient number, since it is larger than the sum of its proper divisors (131148272).

172535668 is a wasteful number, since it uses less digits than its factorization.

172535668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249506 (or 249504 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 172535668 is about 13135.2833239333. The cubic root of 172535668 is about 556.7065057284.

The spelling of 172535668 in words is "one hundred seventy-two million, five hundred thirty-five thousand, six hundred sixty-eight".