172106293 has 2 divisors, whose sum is σ = 172106294. Its totient is φ = 172106292.

The previous prime is 172106279. The next prime is 172106299. The reversal of 172106293 is 392601271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120165444 + 51940849 = 10962^2 + 7207^2 .

It is an emirp because it is prime and its reverse (392601271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172106293 - 2²¹ = 170009141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172106299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86053146 + 86053147.

It is an arithmetic number, because the mean of its divisors is an integer number (86053147).

Almost surely, 2^172106293 is an apocalyptic number.

It is an amenable number.

172106293 is a deficient number, since it is larger than the sum of its proper divisors (1).

172106293 is an equidigital number, since it uses as much as digits as its factorization.

172106293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 172106293 is about 13118.9288053560. The cubic root of 172106293 is about 556.2443125623.

The spelling of 172106293 in words is "one hundred seventy-two million, one hundred six thousand, two hundred ninety-three".