198996709 has 16 divisors (see below), whose sum is σ = 212800000. Its totient is φ = 185554800.

The previous prime is 198996697. The next prime is 198996727. The reversal of 198996709 is 907699891.

It is a cyclic number.

It is not a de Polignac number, because 198996709 - 2⁹ = 198996197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198996779) 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 15 ways as a sum of consecutive naturals, for example, 398542 + ... + 399040.

It is an arithmetic number, because the mean of its divisors is an integer number (13300000).

Almost surely, 2^198996709 is an apocalyptic number.

198996709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198996709 is a deficient number, since it is larger than the sum of its proper divisors (13803291).

198996709 is a wasteful number, since it uses less digits than its factorization.

198996709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 198996709 is about 14106.6193327813. The cubic root of 198996709 is about 583.8240276793.

The spelling of 198996709 in words is "one hundred ninety-eight million, nine hundred ninety-six thousand, seven hundred nine".