199313774287 has 2 divisors, whose sum is σ = 199313774288. Its totient is φ = 199313774286.

The previous prime is 199313774281. The next prime is 199313774323. The reversal of 199313774287 is 782477313991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199313774287 - 2¹¹ = 199313772239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199313774281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99656887143 + 99656887144.

It is an arithmetic number, because the mean of its divisors is an integer number (99656887144).

Almost surely, 2^199313774287 is an apocalyptic number.

199313774287 is a deficient number, since it is larger than the sum of its proper divisors (1).

199313774287 is an equidigital number, since it uses as much as digits as its factorization.

199313774287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The spelling of 199313774287 in words is "one hundred ninety-nine billion, three hundred thirteen million, seven hundred seventy-four thousand, two hundred eighty-seven".