27423999257 has 2 divisors, whose sum is σ = 27423999258. Its totient is φ = 27423999256.

The previous prime is 27423999233. The next prime is 27423999283. The reversal of 27423999257 is 75299932472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26030918281 + 1393080976 = 161341^2 + 37324^2 .

It is a cyclic number.

It is not a de Polignac number, because 27423999257 - 2¹² = 27423995161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27423999196 and 27423999205.

It is not a weakly prime, because it can be changed into another prime (27423999227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13711999628 + 13711999629.

It is an arithmetic number, because the mean of its divisors is an integer number (13711999629).

Almost surely, 2^27423999257 is an apocalyptic number.

It is an amenable number.

27423999257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27423999257 is an equidigital number, since it uses as much as digits as its factorization.

27423999257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 59.

The spelling of 27423999257 in words is "twenty-seven billion, four hundred twenty-three million, nine hundred ninety-nine thousand, two hundred fifty-seven".