197201087 has 4 divisors (see below), whose sum is σ = 197295336. Its totient is φ = 197106840.

The previous prime is 197201063. The next prime is 197201089. The reversal of 197201087 is 780102791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780102791 = 13 ⋅60007907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197201087 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 (197201089) 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, 43913 + ... + 48194.

It is an arithmetic number, because the mean of its divisors is an integer number (49323834).

Almost surely, 2^197201087 is an apocalyptic number.

197201087 is a deficient number, since it is larger than the sum of its proper divisors (94249).

197201087 is an equidigital number, since it uses as much as digits as its factorization.

197201087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94248.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 197201087 is about 14042.8304483106. The cubic root of 197201087 is about 582.0626981811.

The spelling of 197201087 in words is "one hundred ninety-seven million, two hundred one thousand, eighty-seven".