197999995 has 8 divisors (see below), whose sum is σ = 237677616. Its totient is φ = 158348256.

The previous prime is 197999983. The next prime is 197999999. The reversal of 197999995 is 599999791.

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

It is a cyclic number.

It is not a de Polignac number, because 197999995 - 2²¹ = 195902843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197999995.

It is not an unprimeable number, because it can be changed into a prime (197999999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20884 + ... + 28846.

It is an arithmetic number, because the mean of its divisors is an integer number (29709702).

Almost surely, 2^197999995 is an apocalyptic number.

197999995 is a deficient number, since it is larger than the sum of its proper divisors (39677621).

197999995 is an equidigital number, since it uses as much as digits as its factorization.

197999995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12941.

The product of its digits is 18600435, while the sum is 67.

The square root of 197999995 is about 14071.2471018030. The cubic root of 197999995 is about 582.8476634190.

The spelling of 197999995 in words is "one hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred ninety-five".