1698749198 has 4 divisors (see below), whose sum is σ = 2548123800. Its totient is φ = 849374598.

The previous prime is 1698749179. The next prime is 1698749243. The reversal of 1698749198 is 8919478961.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1698749198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424687298 + ... + 424687301.

It is an arithmetic number, because the mean of its divisors is an integer number (637030950).

Almost surely, 2^1698749198 is an apocalyptic number.

1698749198 is a deficient number, since it is larger than the sum of its proper divisors (849374602).

1698749198 is an equidigital number, since it uses as much as digits as its factorization.

1698749198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849374601.

The product of its digits is 7838208, while the sum is 62.

The square root of 1698749198 is about 41215.8852628450. The cubic root of 1698749198 is about 1193.1904120385.

The spelling of 1698749198 in words is "one billion, six hundred ninety-eight million, seven hundred forty-nine thousand, one hundred ninety-eight".