172724534 has 8 divisors (see below), whose sum is σ = 259155288. Its totient is φ = 86339440.

The previous prime is 172724533. The next prime is 172724537. The reversal of 172724534 is 435427271.

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 = 172724494 and 172724503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172724533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554 + ... + 18594.

It is an arithmetic number, because the mean of its divisors is an integer number (32394411).

Almost surely, 2^172724534 is an apocalyptic number.

172724534 is a deficient number, since it is larger than the sum of its proper divisors (86430754).

172724534 is a wasteful number, since it uses less digits than its factorization.

172724534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830.

The product of its digits is 47040, while the sum is 35.

The square root of 172724534 is about 13142.4706200927. The cubic root of 172724534 is about 556.9095643975.

The spelling of 172724534 in words is "one hundred seventy-two million, seven hundred twenty-four thousand, five hundred thirty-four".