201678197 has 8 divisors (see below), whose sum is σ = 234838656. Its totient is φ = 169605072.

The previous prime is 201678193. The next prime is 201678227. The reversal of 201678197 is 791876102.

201678197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201678197 - 2² = 201678193 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 (201678193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271433 + ... + 272174.

It is an arithmetic number, because the mean of its divisors is an integer number (29354832).

Almost surely, 2^201678197 is an apocalyptic number.

It is an amenable number.

201678197 is a deficient number, since it is larger than the sum of its proper divisors (33160459).

201678197 is an equidigital number, since it uses as much as digits as its factorization.

201678197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543667.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 201678197 is about 14201.3449011000. The cubic root of 201678197 is about 586.4346864259.

The spelling of 201678197 in words is "two hundred one million, six hundred seventy-eight thousand, one hundred ninety-seven".