199802997 has 16 divisors (see below), whose sum is σ = 304006080. Its totient is φ = 129601296.

The previous prime is 199802987. The next prime is 199803007. The reversal of 199802997 is 799208991.

199802997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199802987) and next prime (199803007).

It is not a de Polignac number, because 199802997 - 2²³ = 191414389 is a prime.

It is a super-2 number, since 2×199802997² = 79842475220364018, which contains 22 as substring.

199802997 is a modest number, since divided by 2997 gives 1998 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199802927) 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, 99003 + ... + 101000.

It is an arithmetic number, because the mean of its divisors is an integer number (19000380).

Almost surely, 2^199802997 is an apocalyptic number.

It is an amenable number.

199802997 is a deficient number, since it is larger than the sum of its proper divisors (104203083).

199802997 is a wasteful number, since it uses less digits than its factorization.

199802997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200049 (or 200043 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 199802997 is about 14135.1687998411. The cubic root of 199802997 is about 584.6114711405.

The spelling of 199802997 in words is "one hundred ninety-nine million, eight hundred two thousand, nine hundred ninety-seven".