198649503 has 40 divisors (see below), whose sum is σ = 336428400. Its totient is φ = 115800192.

The previous prime is 198649453. The next prime is 198649531. The reversal of 198649503 is 305946891.

It is a happy number.

It is not a de Polignac number, because 198649503 - 2¹⁰ = 198648479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198649903) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15043 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (8410710).

Almost surely, 2^198649503 is an apocalyptic number.

198649503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

198649503 is a deficient number, since it is larger than the sum of its proper divisors (137778897).

198649503 is a wasteful number, since it uses less digits than its factorization.

198649503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9973 (or 9964 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 198649503 is about 14094.3074679106. The cubic root of 198649503 is about 583.4842813352.

The spelling of 198649503 in words is "one hundred ninety-eight million, six hundred forty-nine thousand, five hundred three".