198562409 has 8 divisors (see below), whose sum is σ = 207777792. Its totient is φ = 189522720.

The previous prime is 198562393. The next prime is 198562421. The reversal of 198562409 is 904265891.

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 198562409 - 2⁴ = 198562393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198562409.

It is not an unprimeable number, because it can be changed into a prime (198562439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41609 + ... + 46134.

It is an arithmetic number, because the mean of its divisors is an integer number (25972224).

Almost surely, 2^198562409 is an apocalyptic number.

It is an amenable number.

198562409 is a deficient number, since it is larger than the sum of its proper divisors (9215383).

198562409 is an equidigital number, since it uses as much as digits as its factorization.

198562409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87847.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 198562409 is about 14091.2174420807. The cubic root of 198562409 is about 583.3989964360.

The spelling of 198562409 in words is "one hundred ninety-eight million, five hundred sixty-two thousand, four hundred nine".