199127387 has 4 divisors (see below), whose sum is σ = 199184016. Its totient is φ = 199070760.

The previous prime is 199127347. The next prime is 199127389. The reversal of 199127387 is 783721991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783721991 = 13 ⋅60286307.

It is a cyclic number.

It is not a de Polignac number, because 199127387 - 2¹⁰ = 199126363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199127389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22664 + ... + 30197.

It is an arithmetic number, because the mean of its divisors is an integer number (49796004).

Almost surely, 2^199127387 is an apocalyptic number.

199127387 is a deficient number, since it is larger than the sum of its proper divisors (56629).

199127387 is an equidigital number, since it uses as much as digits as its factorization.

199127387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56628.

The product of its digits is 190512, while the sum is 47.

The square root of 199127387 is about 14111.2503698290. The cubic root of 199127387 is about 583.9517957257.

The spelling of 199127387 in words is "one hundred ninety-nine million, one hundred twenty-seven thousand, three hundred eighty-seven".