198140913 has 6 divisors (see below), whose sum is σ = 286203554. Its totient is φ = 132093936.

The previous prime is 198140897. The next prime is 198140923. The reversal of 198140913 is 319041891.

It can be written as a sum of positive squares in only one way, i.e., 120824064 + 77316849 = 10992^2 + 8793^2 .

It is not a de Polignac number, because 198140913 - 2⁴ = 198140897 is a prime.

It is a super-3 number, since 3×198140913³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198140923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11007820 + ... + 11007837.

Almost surely, 2^198140913 is an apocalyptic number.

It is an amenable number.

198140913 is a deficient number, since it is larger than the sum of its proper divisors (88062641).

198140913 is a wasteful number, since it uses less digits than its factorization.

198140913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22015663 (or 22015660 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 198140913 is about 14076.2535143411. The cubic root of 198140913 is about 582.9859029001.

The spelling of 198140913 in words is "one hundred ninety-eight million, one hundred forty thousand, nine hundred thirteen".