198540127 has 4 divisors (see below), whose sum is σ = 210218976. Its totient is φ = 186861280.

The previous prime is 198540109. The next prime is 198540149. The reversal of 198540127 is 721045891.

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

It is not a de Polignac number, because 198540127 - 2¹¹ = 198538079 is a prime.

It is a super-2 number, since 2×198540127² = 78836364058352258, which contains 22 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 (198540157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5839399 + ... + 5839432.

It is an arithmetic number, because the mean of its divisors is an integer number (52554744).

Almost surely, 2^198540127 is an apocalyptic number.

198540127 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

198540127 is a deficient number, since it is larger than the sum of its proper divisors (11678849).

198540127 is a wasteful number, since it uses less digits than its factorization.

198540127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678848.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 198540127 is about 14090.4267855874. The cubic root of 198540127 is about 583.3771732675.

The spelling of 198540127 in words is "one hundred ninety-eight million, five hundred forty thousand, one hundred twenty-seven".