198393407 has 4 divisors (see below), whose sum is σ = 200213640. Its totient is φ = 196573176.

The previous prime is 198393389. The next prime is 198393427. The reversal of 198393407 is 704393891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704393891 = 223 ⋅3158717.

It is a cyclic number.

It is not a de Polignac number, because 198393407 - 2¹² = 198389311 is a prime.

It is a super-3 number, since 3×198393407³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198393427) 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, 909953 + ... + 910170.

It is an arithmetic number, because the mean of its divisors is an integer number (50053410).

Almost surely, 2^198393407 is an apocalyptic number.

198393407 is a deficient number, since it is larger than the sum of its proper divisors (1820233).

198393407 is a wasteful number, since it uses less digits than its factorization.

198393407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820232.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 198393407 is about 14085.2194516095. The cubic root of 198393407 is about 583.2334337406.

The spelling of 198393407 in words is "one hundred ninety-eight million, three hundred ninety-three thousand, four hundred seven".