197907998 has 4 divisors (see below), whose sum is σ = 296862000. Its totient is φ = 98953998.

The previous prime is 197907991. The next prime is 197908001. The reversal of 197907998 is 899709791.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197907991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49476998 + ... + 49477001.

It is an arithmetic number, because the mean of its divisors is an integer number (74215500).

Almost surely, 2^197907998 is an apocalyptic number.

197907998 is a deficient number, since it is larger than the sum of its proper divisors (98954002).

197907998 is an equidigital number, since it uses as much as digits as its factorization.

197907998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98954001.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 197907998 is about 14067.9777509065. The cubic root of 197907998 is about 582.7573796740.

The spelling of 197907998 in words is "one hundred ninety-seven million, nine hundred seven thousand, nine hundred ninety-eight".