198436487 has 8 divisors (see below), whose sum is σ = 205570560. Its totient is φ = 191348280.

The previous prime is 198436481. The next prime is 198436493. The reversal of 198436487 is 784634891.

It is an interprime number because it is at equal distance from previous prime (198436481) and next prime (198436493).

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 198436487 - 2⁶ = 198436423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198436481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537 + ... + 20082.

It is an arithmetic number, because the mean of its divisors is an integer number (25696320).

Almost surely, 2^198436487 is an apocalyptic number.

198436487 is a deficient number, since it is larger than the sum of its proper divisors (7134073).

198436487 is a wasteful number, since it uses less digits than its factorization.

198436487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22933.

The product of its digits is 1161216, while the sum is 50.

The square root of 198436487 is about 14086.7486312492. The cubic root of 198436487 is about 583.2756459597.

The spelling of 198436487 in words is "one hundred ninety-eight million, four hundred thirty-six thousand, four hundred eighty-seven".