172601641 has 2 divisors, whose sum is σ = 172601642. Its totient is φ = 172601640.

The previous prime is 172601623. The next prime is 172601669. The reversal of 172601641 is 146106271.

It is an a-pointer prime, because the next prime (172601669) can be obtained adding 172601641 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168896016 + 3705625 = 12996^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 172601641 - 2¹¹ = 172599593 is a prime.

It is equal to p_9640432 and since 172601641 and 9640432 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (172608641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86300820 + 86300821.

It is an arithmetic number, because the mean of its divisors is an integer number (86300821).

Almost surely, 2^172601641 is an apocalyptic number.

It is an amenable number.

172601641 is a deficient number, since it is larger than the sum of its proper divisors (1).

172601641 is an equidigital number, since it uses as much as digits as its factorization.

172601641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 172601641 is about 13137.7943734860. The cubic root of 172601641 is about 556.7774532191. Note that the first 3 decimals are identical.

The spelling of 172601641 in words is "one hundred seventy-two million, six hundred one thousand, six hundred forty-one".