27479642969 has 2 divisors, whose sum is σ = 27479642970. Its totient is φ = 27479642968.

The previous prime is 27479642959. The next prime is 27479643029. The reversal of 27479642969 is 96924697472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27218400400 + 261242569 = 164980^2 + 16163^2 .

It is a cyclic number.

It is not a de Polignac number, because 27479642969 - 2¹² = 27479638873 is a prime.

It is a super-2 number, since 2×27479642969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27479642929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13739821484 + 13739821485.

It is an arithmetic number, because the mean of its divisors is an integer number (13739821485).

Almost surely, 2^27479642969 is an apocalyptic number.

It is an amenable number.

27479642969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27479642969 is an equidigital number, since it uses as much as digits as its factorization.

27479642969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 65.

The spelling of 27479642969 in words is "twenty-seven billion, four hundred seventy-nine million, six hundred forty-two thousand, nine hundred sixty-nine".