172727126393 has 2 divisors, whose sum is σ = 172727126394. Its totient is φ = 172727126392.

The previous prime is 172727126323. The next prime is 172727126401. The reversal of 172727126393 is 393621727271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132178054969 + 40549071424 = 363563^2 + 201368^2 .

It is an emirp because it is prime and its reverse (393621727271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172727126393 - 2²⁰ = 172726077817 is a prime.

It is not a weakly prime, because it can be changed into another prime (172727126323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86363563196 + 86363563197.

It is an arithmetic number, because the mean of its divisors is an integer number (86363563197).

Almost surely, 2^172727126393 is an apocalyptic number.

It is an amenable number.

172727126393 is a deficient number, since it is larger than the sum of its proper divisors (1).

172727126393 is an equidigital number, since it uses as much as digits as its factorization.

172727126393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The spelling of 172727126393 in words is "one hundred seventy-two billion, seven hundred twenty-seven million, one hundred twenty-six thousand, three hundred ninety-three".