199247001887 has 2 divisors, whose sum is σ = 199247001888. Its totient is φ = 199247001886.

The previous prime is 199247001881. The next prime is 199247001913. The reversal of 199247001887 is 788100742991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199247001887 - 2⁸ = 199247001631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199247001881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99623500943 + 99623500944.

It is an arithmetic number, because the mean of its divisors is an integer number (99623500944).

Almost surely, 2^199247001887 is an apocalyptic number.

199247001887 is a deficient number, since it is larger than the sum of its proper divisors (1).

199247001887 is an equidigital number, since it uses as much as digits as its factorization.

199247001887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 199247001887 in words is "one hundred ninety-nine billion, two hundred forty-seven million, one thousand, eight hundred eighty-seven".