27919342831 has 2 divisors, whose sum is σ = 27919342832. Its totient is φ = 27919342830.

The previous prime is 27919342817. The next prime is 27919342861. The reversal of 27919342831 is 13824391972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27919342831 - 2⁵ = 27919342799 is a prime.

It is a super-2 number, since 2×27919342831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27919342861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13959671415 + 13959671416.

It is an arithmetic number, because the mean of its divisors is an integer number (13959671416).

Almost surely, 2^27919342831 is an apocalyptic number.

27919342831 is a deficient number, since it is larger than the sum of its proper divisors (1).

27919342831 is an equidigital number, since it uses as much as digits as its factorization.

27919342831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The spelling of 27919342831 in words is "twenty-seven billion, nine hundred nineteen million, three hundred forty-two thousand, eight hundred thirty-one".