198729541 has 4 divisors (see below), whose sum is σ = 210419532. Its totient is φ = 187039552.

The previous prime is 198729529. The next prime is 198729577. The reversal of 198729541 is 145927891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 151807041 + 46922500 = 12321^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 198729541 - 2⁷ = 198729413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198729491 and 198729500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198729511) 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, 5844970 + ... + 5845003.

It is an arithmetic number, because the mean of its divisors is an integer number (52604883).

Almost surely, 2^198729541 is an apocalyptic number.

It is an amenable number.

198729541 is a deficient number, since it is larger than the sum of its proper divisors (11689991).

198729541 is a wasteful number, since it uses less digits than its factorization.

198729541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11689990.

The product of its digits is 181440, while the sum is 46.

The square root of 198729541 is about 14097.1465552430. The cubic root of 198729541 is about 583.5626348230.

The spelling of 198729541 in words is "one hundred ninety-eight million, seven hundred twenty-nine thousand, five hundred forty-one".