198726749 has 8 divisors (see below), whose sum is σ = 214445952. Its totient is φ = 183069360.

The previous prime is 198726683. The next prime is 198726751. The reversal of 198726749 is 947627891.

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 198726749 - 2¹⁶ = 198661213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198726749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198720749) 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, 8657 + ... + 21734.

It is an arithmetic number, because the mean of its divisors is an integer number (26805744).

Almost surely, 2^198726749 is an apocalyptic number.

It is an amenable number.

198726749 is a deficient number, since it is larger than the sum of its proper divisors (15719203).

198726749 is a wasteful number, since it uses less digits than its factorization.

198726749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30907.

The product of its digits is 1524096, while the sum is 53.

The square root of 198726749 is about 14097.0475277627. The cubic root of 198726749 is about 583.5599019387.

The spelling of 198726749 in words is "one hundred ninety-eight million, seven hundred twenty-six thousand, seven hundred forty-nine".