27497987423 has 2 divisors, whose sum is σ = 27497987424. Its totient is φ = 27497987422.

The previous prime is 27497987393. The next prime is 27497987449. The reversal of 27497987423 is 32478979472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27497987423 - 2³⁰ = 26424245599 is a prime.

It is a super-2 number, since 2×27497987423² (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 (27497987623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13748993711 + 13748993712.

It is an arithmetic number, because the mean of its divisors is an integer number (13748993712).

Almost surely, 2^27497987423 is an apocalyptic number.

27497987423 is a deficient number, since it is larger than the sum of its proper divisors (1).

27497987423 is an equidigital number, since it uses as much as digits as its factorization.

27497987423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 62.

The spelling of 27497987423 in words is "twenty-seven billion, four hundred ninety-seven million, nine hundred eighty-seven thousand, four hundred twenty-three".