198408525 has 96 divisors (see below), whose sum is σ = 394641408. Its totient is φ = 86054400.

The previous prime is 198408523. The next prime is 198408527. The reversal of 198408525 is 525804891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (198408523) and next prime (198408527).

It is not a de Polignac number, because 198408525 - 2¹ = 198408523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198408523) 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 95 ways as a sum of consecutive naturals, for example, 1187992 + ... + 1188158.

It is an arithmetic number, because the mean of its divisors is an integer number (4110848).

Almost surely, 2^198408525 is an apocalyptic number.

198408525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198408525 is a deficient number, since it is larger than the sum of its proper divisors (196232883).

198408525 is a wasteful number, since it uses less digits than its factorization.

198408525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 198408525 is about 14085.7561032413. The cubic root of 198408525 is about 583.2482479074.

The spelling of 198408525 in words is "one hundred ninety-eight million, four hundred eight thousand, five hundred twenty-five".