198726249 has 4 divisors (see below), whose sum is σ = 264968336. Its totient is φ = 132484164.

The previous prime is 198726247. The next prime is 198726257. The reversal of 198726249 is 942627891.

198726249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 198726249 - 2¹ = 198726247 is a prime.

It is a super-2 number, since 2×198726249² = 78984244083220002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 198726198 and 198726207.

It is not an unprimeable number, because it can be changed into a prime (198726247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33121039 + ... + 33121044.

It is an arithmetic number, because the mean of its divisors is an integer number (66242084).

Almost surely, 2^198726249 is an apocalyptic number.

It is an amenable number.

198726249 is a deficient number, since it is larger than the sum of its proper divisors (66242087).

198726249 is an equidigital number, since it uses as much as digits as its factorization.

198726249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66242086.

The product of its digits is 435456, while the sum is 48.

The square root of 198726249 is about 14097.0297935416. The cubic root of 198726249 is about 583.5594125226.

The spelling of 198726249 in words is "one hundred ninety-eight million, seven hundred twenty-six thousand, two hundred forty-nine".