172338947 has 8 divisors (see below), whose sum is σ = 188102640. Its totient is φ = 156591360.

The previous prime is 172338923. The next prime is 172338953. The reversal of 172338947 is 749833271.

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

It is a cyclic number.

It is not a de Polignac number, because 172338947 - 2²² = 168144643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172338898 and 172338907.

It is not an unprimeable number, because it can be changed into a prime (172338917) 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 7 ways as a sum of consecutive naturals, for example, 34079 + ... + 38807.

It is an arithmetic number, because the mean of its divisors is an integer number (23512830).

Almost surely, 2^172338947 is an apocalyptic number.

172338947 is a deficient number, since it is larger than the sum of its proper divisors (15763693).

172338947 is a wasteful number, since it uses less digits than its factorization.

172338947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053.

The product of its digits is 254016, while the sum is 44.

The square root of 172338947 is about 13127.7929218890. The cubic root of 172338947 is about 556.4948441618.

The spelling of 172338947 in words is "one hundred seventy-two million, three hundred thirty-eight thousand, nine hundred forty-seven".