171226493 has 2 divisors, whose sum is σ = 171226494. Its totient is φ = 171226492.

The previous prime is 171226483. The next prime is 171226501. The reversal of 171226493 is 394622171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163149529 + 8076964 = 12773^2 + 2842^2 .

It is a cyclic number.

It is not a de Polignac number, because 171226493 - 2²² = 167032189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171226483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85613246 + 85613247.

It is an arithmetic number, because the mean of its divisors is an integer number (85613247).

Almost surely, 2^171226493 is an apocalyptic number.

It is an amenable number.

171226493 is a deficient number, since it is larger than the sum of its proper divisors (1).

171226493 is an equidigital number, since it uses as much as digits as its factorization.

171226493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 171226493 is about 13085.3541411763. The cubic root of 171226493 is about 555.2948604981.

The spelling of 171226493 in words is "one hundred seventy-one million, two hundred twenty-six thousand, four hundred ninety-three".