27793457 has 2 divisors, whose sum is σ = 27793458. Its totient is φ = 27793456.

The previous prime is 27793411. The next prime is 27793459. The reversal of 27793457 is 75439772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20802721 + 6990736 = 4561^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 27793457 - 2⁶ = 27793393 is a prime.

Together with 27793459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27793459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13896728 + 13896729.

It is an arithmetic number, because the mean of its divisors is an integer number (13896729).

Almost surely, 2^27793457 is an apocalyptic number.

It is an amenable number.

27793457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27793457 is an equidigital number, since it uses as much as digits as its factorization.

27793457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 44.

The square root of 27793457 is about 5271.9500187312. The cubic root of 27793457 is about 302.9104034960.

The spelling of 27793457 in words is "twenty-seven million, seven hundred ninety-three thousand, four hundred fifty-seven".