198393904007 has 4 divisors (see below), whose sum is σ = 213654973560. Its totient is φ = 183132834456.

The previous prime is 198393903989. The next prime is 198393904019. The reversal of 198393904007 is 700409393891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 198393904007 - 2¹² = 198393899911 is a prime.

It is a super-2 number, since 2×198393904007² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198393904007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198393904057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7630534757 + ... + 7630534782.

It is an arithmetic number, because the mean of its divisors is an integer number (53413743390).

Almost surely, 2^198393904007 is an apocalyptic number.

198393904007 is a deficient number, since it is larger than the sum of its proper divisors (15261069553).

198393904007 is a wasteful number, since it uses less digits than its factorization.

198393904007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15261069552.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 198393904007 in words is "one hundred ninety-eight billion, three hundred ninety-three million, nine hundred four thousand, seven".