198562439 has 2 divisors, whose sum is σ = 198562440. Its totient is φ = 198562438.

The previous prime is 198562421. The next prime is 198562487. The reversal of 198562439 is 934265891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198562439 - 2²⁰ = 197513863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198562393 and 198562402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198562489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99281219 + 99281220.

It is an arithmetic number, because the mean of its divisors is an integer number (99281220).

Almost surely, 2^198562439 is an apocalyptic number.

198562439 is a deficient number, since it is larger than the sum of its proper divisors (1).

198562439 is an equidigital number, since it uses as much as digits as its factorization.

198562439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 198562439 is about 14091.2185065735. The cubic root of 198562439 is about 583.3990258171.

The spelling of 198562439 in words is "one hundred ninety-eight million, five hundred sixty-two thousand, four hundred thirty-nine".