198614749 has 4 divisors (see below), whose sum is σ = 199086940. Its totient is φ = 198142560.

The previous prime is 198614747. The next prime is 198614837. The reversal of 198614749 is 947416891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947416891 = 389 ⋅2435519.

It can be written as a sum of positive squares in 2 ways, for example, as 14822500 + 183792249 = 3850^2 + 13557^2 .

It is a cyclic number.

It is not a de Polignac number, because 198614749 - 2¹ = 198614747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198614747) 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, 235464 + ... + 236305.

It is an arithmetic number, because the mean of its divisors is an integer number (49771735).

Almost surely, 2^198614749 is an apocalyptic number.

It is an amenable number.

198614749 is a deficient number, since it is larger than the sum of its proper divisors (472191).

198614749 is an equidigital number, since it uses as much as digits as its factorization.

198614749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472190.

The product of its digits is 435456, while the sum is 49.

The square root of 198614749 is about 14093.0745048765. The cubic root of 198614749 is about 583.4502522285.

The spelling of 198614749 in words is "one hundred ninety-eight million, six hundred fourteen thousand, seven hundred forty-nine".