172747441 has 2 divisors, whose sum is σ = 172747442. Its totient is φ = 172747440.

The previous prime is 172747439. The next prime is 172747447. The reversal of 172747441 is 144747271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130873600 + 41873841 = 11440^2 + 6471^2 .

It is a cyclic number.

It is not a de Polignac number, because 172747441 - 2¹ = 172747439 is a prime.

Together with 172747439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 172747441.

It is not a weakly prime, because it can be changed into another prime (172747447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86373720 + 86373721.

It is an arithmetic number, because the mean of its divisors is an integer number (86373721).

Almost surely, 2^172747441 is an apocalyptic number.

It is an amenable number.

172747441 is a deficient number, since it is larger than the sum of its proper divisors (1).

172747441 is an equidigital number, since it uses as much as digits as its factorization.

172747441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904, while the sum is 37.

The square root of 172747441 is about 13143.3420787865. The cubic root of 172747441 is about 556.9341827174.

The spelling of 172747441 in words is "one hundred seventy-two million, seven hundred forty-seven thousand, four hundred forty-one".