198969487 has 2 divisors, whose sum is σ = 198969488. Its totient is φ = 198969486.

The previous prime is 198969467. The next prime is 198969571. The reversal of 198969487 is 784969891.

198969487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (784969891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198969487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198969467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99484743 + 99484744.

It is an arithmetic number, because the mean of its divisors is an integer number (99484744).

Almost surely, 2^198969487 is an apocalyptic number.

198969487 is a deficient number, since it is larger than the sum of its proper divisors (1).

198969487 is an equidigital number, since it uses as much as digits as its factorization.

198969487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 61.

The square root of 198969487 is about 14105.6544335951. The cubic root of 198969487 is about 583.7974048229.

The spelling of 198969487 in words is "one hundred ninety-eight million, nine hundred sixty-nine thousand, four hundred eighty-seven".