171200397 has 4 divisors (see below), whose sum is σ = 228267200. Its totient is φ = 114133596.

The previous prime is 171200377. The next prime is 171200399. The reversal of 171200397 is 793002171.

171200397 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.

It is not a de Polignac number, because 171200397 - 2⁶ = 171200333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171200399) 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, 28533397 + ... + 28533402.

It is an arithmetic number, because the mean of its divisors is an integer number (57066800).

Almost surely, 2^171200397 is an apocalyptic number.

It is an amenable number.

171200397 is a deficient number, since it is larger than the sum of its proper divisors (57066803).

171200397 is an equidigital number, since it uses as much as digits as its factorization.

171200397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57066802.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 171200397 is about 13084.3569578333. The cubic root of 171200397 is about 555.2666489157.

The spelling of 171200397 in words is "one hundred seventy-one million, two hundred thousand, three hundred ninety-seven".