172438961 has 8 divisors (see below), whose sum is σ = 174239424. Its totient is φ = 170648080.

The previous prime is 172438951. The next prime is 172438969. The reversal of 172438961 is 169834271.

172438961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172438961 - 2⁶ = 172438897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172438969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37076 + ... + 41466.

It is an arithmetic number, because the mean of its divisors is an integer number (21779928).

Almost surely, 2^172438961 is an apocalyptic number.

It is an amenable number.

172438961 is a deficient number, since it is larger than the sum of its proper divisors (1800463).

172438961 is a wasteful number, since it uses less digits than its factorization.

172438961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791.

The product of its digits is 72576, while the sum is 41.

The square root of 172438961 is about 13131.6016159492. The cubic root of 172438961 is about 556.6024741418.

The spelling of 172438961 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, nine hundred sixty-one".