397100687171 has 4 divisors (see below), whose sum is σ = 397141296144. Its totient is φ = 397060078200.

The previous prime is 397100687153. The next prime is 397100687209. The reversal of 397100687171 is 171786001793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397100687171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397100687671) 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, 20289815 + ... + 20309376.

It is an arithmetic number, because the mean of its divisors is an integer number (99285324036).

Almost surely, 2^397100687171 is an apocalyptic number.

397100687171 is a deficient number, since it is larger than the sum of its proper divisors (40608973).

397100687171 is an equidigital number, since it uses as much as digits as its factorization.

397100687171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40608972.

The product of its (nonzero) digits is 444528, while the sum is 50.

The spelling of 397100687171 in words is "three hundred ninety-seven billion, one hundred million, six hundred eighty-seven thousand, one hundred seventy-one".