171145497 has 4 divisors (see below), whose sum is σ = 228194000. Its totient is φ = 114096996.

The previous prime is 171145463. The next prime is 171145517. The reversal of 171145497 is 794541171.

It is a happy number.

171145497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794541171 = 3 ⋅264847057.

It is not a de Polignac number, because 171145497 - 2⁶ = 171145433 is a prime.

It is a super-2 number, since 2×171145497² = 58581562286754018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171145097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524247 + ... + 28524252.

It is an arithmetic number, because the mean of its divisors is an integer number (57048500).

Almost surely, 2^171145497 is an apocalyptic number.

It is an amenable number.

171145497 is a deficient number, since it is larger than the sum of its proper divisors (57048503).

171145497 is an equidigital number, since it uses as much as digits as its factorization.

171145497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57048502.

The product of its digits is 35280, while the sum is 39.

The square root of 171145497 is about 13082.2588645845. The cubic root of 171145497 is about 555.2072888545.

The spelling of 171145497 in words is "one hundred seventy-one million, one hundred forty-five thousand, four hundred ninety-seven".