198540071 has 8 divisors (see below), whose sum is σ = 210012000. Its totient is φ = 187304832.

The previous prime is 198540049. The next prime is 198540077. The reversal of 198540071 is 170045891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198540071 - 2⁶ = 198540007 is a prime.

It is a super-3 number, since 3×198540071³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198540077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57446 + ... + 60803.

It is an arithmetic number, because the mean of its divisors is an integer number (26251500).

Almost surely, 2^198540071 is an apocalyptic number.

198540071 is a deficient number, since it is larger than the sum of its proper divisors (11471929).

198540071 is a wasteful number, since it uses less digits than its factorization.

198540071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118345.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 198540071 is about 14090.4247984225. The cubic root of 198540071 is about 583.3771184186.

The spelling of 198540071 in words is "one hundred ninety-eight million, five hundred forty thousand, seventy-one".