198426907 has 16 divisors (see below), whose sum is σ = 243164160. Its totient is φ = 158041728.

The previous prime is 198426901. The next prime is 198426919. The reversal of 198426907 is 709624891.

It is a cyclic number.

It is not a de Polignac number, because 198426907 - 2⁷ = 198426779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198426901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153 + ... + 19954.

It is an arithmetic number, because the mean of its divisors is an integer number (15197760).

Almost surely, 2^198426907 is an apocalyptic number.

198426907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

198426907 is a deficient number, since it is larger than the sum of its proper divisors (44737253).

198426907 is a wasteful number, since it uses less digits than its factorization.

198426907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 198426907 is about 14086.4085912627. The cubic root of 198426907 is about 583.2662594625.

The spelling of 198426907 in words is "one hundred ninety-eight million, four hundred twenty-six thousand, nine hundred seven".