172113441 has 4 divisors (see below), whose sum is σ = 229484592. Its totient is φ = 114742292.

The previous prime is 172113437. The next prime is 172113509. The reversal of 172113441 is 144311271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172113441 - 2² = 172113437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172113401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28685571 + ... + 28685576.

It is an arithmetic number, because the mean of its divisors is an integer number (57371148).

Almost surely, 2^172113441 is an apocalyptic number.

It is an amenable number.

172113441 is a deficient number, since it is larger than the sum of its proper divisors (57371151).

172113441 is an equidigital number, since it uses as much as digits as its factorization.

172113441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57371150.

The product of its digits is 672, while the sum is 24.

The square root of 172113441 is about 13119.2012333069. The cubic root of 172113441 is about 556.2520131897.

The spelling of 172113441 in words is "one hundred seventy-two million, one hundred thirteen thousand, four hundred forty-one".