138198698 has 12 divisors (see below), whose sum is σ = 227856930. Its totient is φ = 62817480.

The previous prime is 138198667. The next prime is 138198701. The reversal of 138198698 is 896891831.

It can be written as a sum of positive squares in only one way, i.e., 131629729 + 6568969 = 11473^2 + 2563^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285293 + ... + 285776.

Almost surely, 2^138198698 is an apocalyptic number.

138198698 is a deficient number, since it is larger than the sum of its proper divisors (89658232).

138198698 is a wasteful number, since it uses less digits than its factorization.

138198698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571093 (or 571082 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 138198698 is about 11755.7942309314. The cubic root of 138198698 is about 517.0128259984.

The spelling of 138198698 in words is "one hundred thirty-eight million, one hundred ninety-eight thousand, six hundred ninety-eight".