684032198 has 4 divisors (see below), whose sum is σ = 1026048300. Its totient is φ = 342016098.

The previous prime is 684032197. The next prime is 684032203. The reversal of 684032198 is 891230486.

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

It is a super-2 number, since 2×684032198² = 935800095801422408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684032197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171008048 + ... + 171008051.

It is an arithmetic number, because the mean of its divisors is an integer number (256512075).

Almost surely, 2^684032198 is an apocalyptic number.

684032198 is a deficient number, since it is larger than the sum of its proper divisors (342016102).

684032198 is a wasteful number, since it uses less digits than its factorization.

684032198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342016101.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 684032198 is about 26154.0092146501. The cubic root of 684032198 is about 881.1006364365.

The spelling of 684032198 in words is "six hundred eighty-four million, thirty-two thousand, one hundred ninety-eight".