199281901 has 16 divisors (see below), whose sum is σ = 245887488. Its totient is φ = 157276800.

The previous prime is 199281883. The next prime is 199281931. The reversal of 199281901 is 109182991.

It is a cyclic number.

It is not a de Polignac number, because 199281901 - 2⁷ = 199281773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199281931) 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, 36681 + ... + 41761.

It is an arithmetic number, because the mean of its divisors is an integer number (15367968).

Almost surely, 2^199281901 is an apocalyptic number.

It is an amenable number.

199281901 is a deficient number, since it is larger than the sum of its proper divisors (46605587).

199281901 is a wasteful number, since it uses less digits than its factorization.

199281901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 199281901 is about 14116.7241596625. The cubic root of 199281901 is about 584.1027968869.

The spelling of 199281901 in words is "one hundred ninety-nine million, two hundred eighty-one thousand, nine hundred one".