172652861 has 2 divisors, whose sum is σ = 172652862. Its totient is φ = 172652860.

The previous prime is 172652819. The next prime is 172652897. The reversal of 172652861 is 168256271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172003225 + 649636 = 13115^2 + 806^2 .

It is an emirp because it is prime and its reverse (168256271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172652861 is a prime.

It is a super-2 number, since 2×172652861² = 59618020822970642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172652801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86326430 + 86326431.

It is an arithmetic number, because the mean of its divisors is an integer number (86326431).

Almost surely, 2^172652861 is an apocalyptic number.

It is an amenable number.

172652861 is a deficient number, since it is larger than the sum of its proper divisors (1).

172652861 is an equidigital number, since it uses as much as digits as its factorization.

172652861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 172652861 is about 13139.7435667520. The cubic root of 172652861 is about 556.8325228397.

The spelling of 172652861 in words is "one hundred seventy-two million, six hundred fifty-two thousand, eight hundred sixty-one".