27942799919 has 2 divisors, whose sum is σ = 27942799920. Its totient is φ = 27942799918.

The previous prime is 27942799897. The next prime is 27942799943. The reversal of 27942799919 is 91999724972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27942799919 - 2²⁸ = 27674364463 is a prime.

It is a super-2 number, since 2×27942799919² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27942799979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13971399959 + 13971399960.

It is an arithmetic number, because the mean of its divisors is an integer number (13971399960).

Almost surely, 2^27942799919 is an apocalyptic number.

27942799919 is a deficient number, since it is larger than the sum of its proper divisors (1).

27942799919 is an equidigital number, since it uses as much as digits as its factorization.

27942799919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46294416, while the sum is 68.

The spelling of 27942799919 in words is "twenty-seven billion, nine hundred forty-two million, seven hundred ninety-nine thousand, nine hundred nineteen".