172727389 has 2 divisors, whose sum is σ = 172727390. Its totient is φ = 172727388.

The previous prime is 172727369. The next prime is 172727411. The reversal of 172727389 is 983727271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171164889 + 1562500 = 13083^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 172727389 - 2⁹ = 172726877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172727329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86363694 + 86363695.

It is an arithmetic number, because the mean of its divisors is an integer number (86363695).

Almost surely, 2^172727389 is an apocalyptic number.

It is an amenable number.

172727389 is a deficient number, since it is larger than the sum of its proper divisors (1).

172727389 is an equidigital number, since it uses as much as digits as its factorization.

172727389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 172727389 is about 13142.5792369687. The cubic root of 172727389 is about 556.9126328056.

The spelling of 172727389 in words is "one hundred seventy-two million, seven hundred twenty-seven thousand, three hundred eighty-nine".