172660090 has 8 divisors (see below), whose sum is σ = 310788180. Its totient is φ = 69064032.

The previous prime is 172660079. The next prime is 172660123. The reversal of 172660090 is 90066271.

172660090 is digitally balanced in base 2, because in such base 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 165353881 + 7306209 = 12859^2 + 2703^2 .

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

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, 8632995 + ... + 8633014.

Almost surely, 2^172660090 is an apocalyptic number.

172660090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172660090 is a deficient number, since it is larger than the sum of its proper divisors (138128090).

172660090 is a wasteful number, since it uses less digits than its factorization.

172660090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17266016.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 172660090 is about 13140.0186453445. The cubic root of 172660090 is about 556.8402942837.

It can be divided in two parts, 1726 and 60090, that added together give a palindrome (61816).

The spelling of 172660090 in words is "one hundred seventy-two million, six hundred sixty thousand, ninety".