219127631939 has 2 divisors, whose sum is σ = 219127631940. Its totient is φ = 219127631938.

The previous prime is 219127631861. The next prime is 219127631941. The reversal of 219127631939 is 939136721912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219127631939 is a prime.

Together with 219127631941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219127631039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109563815969 + 109563815970.

It is an arithmetic number, because the mean of its divisors is an integer number (109563815970).

Almost surely, 2^219127631939 is an apocalyptic number.

219127631939 is a deficient number, since it is larger than the sum of its proper divisors (1).

219127631939 is an equidigital number, since it uses as much as digits as its factorization.

219127631939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The spelling of 219127631939 in words is "two hundred nineteen billion, one hundred twenty-seven million, six hundred thirty-one thousand, nine hundred thirty-nine".