172488539 has 4 divisors (see below), whose sum is σ = 173382456. Its totient is φ = 171594624.

The previous prime is 172488529. The next prime is 172488551. The reversal of 172488539 is 935884271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172488539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172488493 and 172488502.

It is not an unprimeable number, because it can be changed into a prime (172488529) 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, 446669 + ... + 447054.

It is an arithmetic number, because the mean of its divisors is an integer number (43345614).

Almost surely, 2^172488539 is an apocalyptic number.

172488539 is a deficient number, since it is larger than the sum of its proper divisors (893917).

172488539 is an equidigital number, since it uses as much as digits as its factorization.

172488539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893916.

The product of its digits is 483840, while the sum is 47.

The square root of 172488539 is about 13133.4892165030. The cubic root of 172488539 is about 556.6558120361.

The spelling of 172488539 in words is "one hundred seventy-two million, four hundred eighty-eight thousand, five hundred thirty-nine".