172144407 has 8 divisors (see below), whose sum is σ = 232291584. Its totient is φ = 113380088.

The previous prime is 172144403. The next prime is 172144421. The reversal of 172144407 is 704441271.

172144407 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 172144407 - 2² = 172144403 is a prime.

It is a super-2 number, since 2×172144407² = 59267393722763298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172144403) 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, 345423 + ... + 345920.

It is an arithmetic number, because the mean of its divisors is an integer number (29036448).

Almost surely, 2^172144407 is an apocalyptic number.

172144407 is a deficient number, since it is larger than the sum of its proper divisors (60147177).

172144407 is an equidigital number, since it uses as much as digits as its factorization.

172144407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691429.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 172144407 is about 13120.3813587868. The cubic root of 172144407 is about 556.2853707761.

Adding to 172144407 its reverse (704441271), we get a palindrome (876585678).

The spelling of 172144407 in words is "one hundred seventy-two million, one hundred forty-four thousand, four hundred seven".