196998287 has 4 divisors (see below), whose sum is σ = 197080296. Its totient is φ = 196916280.

The previous prime is 196998283. The next prime is 196998299. The reversal of 196998287 is 782899691.

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

It is a cyclic number.

It is not a de Polignac number, because 196998287 - 2² = 196998283 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 (196998283) 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 3 ways as a sum of consecutive naturals, for example, 37289 + ... + 42242.

It is an arithmetic number, because the mean of its divisors is an integer number (49270074).

Almost surely, 2^196998287 is an apocalyptic number.

196998287 is a deficient number, since it is larger than the sum of its proper divisors (82009).

196998287 is an equidigital number, since it uses as much as digits as its factorization.

196998287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82008.

The product of its digits is 3919104, while the sum is 59.

The square root of 196998287 is about 14035.6078243872. The cubic root of 196998287 is about 581.8631002230.

The spelling of 196998287 in words is "one hundred ninety-six million, nine hundred ninety-eight thousand, two hundred eighty-seven".