198925747 has 4 divisors (see below), whose sum is σ = 201894856. Its totient is φ = 195956640.

The previous prime is 198925717. The next prime is 198925759. The reversal of 198925747 is 747529891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747529891 = 2843 ⋅262937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198925747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198925694 and 198925703.

It is not an unprimeable number, because it can be changed into a prime (198925717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484454 + ... + 1484587.

It is an arithmetic number, because the mean of its divisors is an integer number (50473714).

Almost surely, 2^198925747 is an apocalyptic number.

198925747 is a deficient number, since it is larger than the sum of its proper divisors (2969109).

198925747 is an equidigital number, since it uses as much as digits as its factorization.

198925747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969108.

The product of its digits is 1270080, while the sum is 52.

The square root of 198925747 is about 14104.1039063104. The cubic root of 198925747 is about 583.7546224340.

The spelling of 198925747 in words is "one hundred ninety-eight million, nine hundred twenty-five thousand, seven hundred forty-seven".