199672901 has 2 divisors, whose sum is σ = 199672902. Its totient is φ = 199672900.

The previous prime is 199672883. The next prime is 199672903. The reversal of 199672901 is 109276991.

199672901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115584001 + 84088900 = 10751^2 + 9170^2 .

It is an emirp because it is prime and its reverse (109276991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199672901 is a prime.

Together with 199672903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199672903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99836450 + 99836451.

It is an arithmetic number, because the mean of its divisors is an integer number (99836451).

Almost surely, 2^199672901 is an apocalyptic number.

It is an amenable number.

199672901 is a deficient number, since it is larger than the sum of its proper divisors (1).

199672901 is an equidigital number, since it uses as much as digits as its factorization.

199672901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 199672901 is about 14130.5661953087. The cubic root of 199672901 is about 584.4845592520.

The spelling of 199672901 in words is "one hundred ninety-nine million, six hundred seventy-two thousand, nine hundred one".