27642743 has 2 divisors, whose sum is σ = 27642744. Its totient is φ = 27642742.

The previous prime is 27642707. The next prime is 27642749. The reversal of 27642743 is 34724672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27642743 - 2¹² = 27638647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27642749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821371 + 13821372.

It is an arithmetic number, because the mean of its divisors is an integer number (13821372).

Almost surely, 2^27642743 is an apocalyptic number.

27642743 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642743 is an equidigital number, since it uses as much as digits as its factorization.

27642743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 35.

The square root of 27642743 is about 5257.6366363605. The cubic root of 27642743 is about 302.3618858151.

The spelling of 27642743 in words is "twenty-seven million, six hundred forty-two thousand, seven hundred forty-three".