172621713 has 32 divisors (see below), whose sum is σ = 256937472. Its totient is φ = 102211200.

The previous prime is 172621711. The next prime is 172621747. The reversal of 172621713 is 317126271.

It is not a de Polignac number, because 172621713 - 2¹ = 172621711 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172621711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315306 + ... + 315852.

It is an arithmetic number, because the mean of its divisors is an integer number (8029296).

Almost surely, 2^172621713 is an apocalyptic number.

It is an amenable number.

172621713 is a deficient number, since it is larger than the sum of its proper divisors (84315759).

172621713 is a wasteful number, since it uses less digits than its factorization.

172621713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765.

The product of its digits is 3528, while the sum is 30.

The square root of 172621713 is about 13138.5582542378. The cubic root of 172621713 is about 556.7990350994.

Adding to 172621713 its reverse (317126271), we get a palindrome (489747984).

The spelling of 172621713 in words is "one hundred seventy-two million, six hundred twenty-one thousand, seven hundred thirteen".