172041757 has 2 divisors, whose sum is σ = 172041758. Its totient is φ = 172041756.

The previous prime is 172041731. The next prime is 172041791. The reversal of 172041757 is 757140271.

It is an a-pointer prime, because the next prime (172041791) can be obtained adding 172041757 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92813956 + 79227801 = 9634^2 + 8901^2 .

It is a cyclic number.

It is not a de Polignac number, because 172041757 - 2⁷ = 172041629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172041707) 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 as a sum of consecutive naturals, namely, 86020878 + 86020879.

It is an arithmetic number, because the mean of its divisors is an integer number (86020879).

Almost surely, 2^172041757 is an apocalyptic number.

It is an amenable number.

172041757 is a deficient number, since it is larger than the sum of its proper divisors (1).

172041757 is an equidigital number, since it uses as much as digits as its factorization.

172041757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 172041757 is about 13116.4689226941. The cubic root of 172041757 is about 556.1747774895.

The spelling of 172041757 in words is "one hundred seventy-two million, forty-one thousand, seven hundred fifty-seven".