172913530 has 8 divisors (see below), whose sum is σ = 311244372. Its totient is φ = 69165408.

The previous prime is 172913527. The next prime is 172913537. The reversal of 172913530 is 35319271.

It can be written as a sum of positive squares in 2 ways, for example, as 144216081 + 28697449 = 12009^2 + 5357^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 172913492 and 172913501.

It is not an unprimeable number, because it can be changed into a prime (172913537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8645667 + ... + 8645686.

Almost surely, 2^172913530 is an apocalyptic number.

172913530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172913530 is a deficient number, since it is larger than the sum of its proper divisors (138330842).

172913530 is a wasteful number, since it uses less digits than its factorization.

172913530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291360.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 172913530 is about 13149.6589309381. The cubic root of 172913530 is about 557.1126147136.

The spelling of 172913530 in words is "one hundred seventy-two million, nine hundred thirteen thousand, five hundred thirty".