27694907431 has 2 divisors, whose sum is σ = 27694907432. Its totient is φ = 27694907430.

The previous prime is 27694907413. The next prime is 27694907437. The reversal of 27694907431 is 13470949672.

Together with previous prime (27694907413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27694907431 - 2⁹ = 27694906919 is a prime.

It is a super-2 number, since 2×27694907431² (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 (27694907437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13847453715 + 13847453716.

It is an arithmetic number, because the mean of its divisors is an integer number (13847453716).

Almost surely, 2^27694907431 is an apocalyptic number.

27694907431 is a deficient number, since it is larger than the sum of its proper divisors (1).

27694907431 is an equidigital number, since it uses as much as digits as its factorization.

27694907431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 27694907431 in words is "twenty-seven billion, six hundred ninety-four million, nine hundred seven thousand, four hundred thirty-one".