199845403 has 2 divisors, whose sum is σ = 199845404. Its totient is φ = 199845402.

The previous prime is 199845383. The next prime is 199845463. The reversal of 199845403 is 304548991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199845403 is a prime.

It is a super-3 number, since 3×199845403³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199845403.

It is not a weakly prime, because it can be changed into another prime (199845463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99922701 + 99922702.

It is an arithmetic number, because the mean of its divisors is an integer number (99922702).

Almost surely, 2^199845403 is an apocalyptic number.

199845403 is a deficient number, since it is larger than the sum of its proper divisors (1).

199845403 is an equidigital number, since it uses as much as digits as its factorization.

199845403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 199845403 is about 14136.6687377189. The cubic root of 199845403 is about 584.6528273443.

The spelling of 199845403 in words is "one hundred ninety-nine million, eight hundred forty-five thousand, four hundred three".