27909793 has 2 divisors, whose sum is σ = 27909794. Its totient is φ = 27909792.

The previous prime is 27909779. The next prime is 27909797. The reversal of 27909793 is 39790972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20903184 + 7006609 = 4572^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 27909793 - 2²¹ = 25812641 is a prime.

It is not a weakly prime, because it can be changed into another prime (27909797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13954896 + 13954897.

It is an arithmetic number, because the mean of its divisors is an integer number (13954897).

Almost surely, 2^27909793 is an apocalyptic number.

It is an amenable number.

27909793 is a deficient number, since it is larger than the sum of its proper divisors (1).

27909793 is an equidigital number, since it uses as much as digits as its factorization.

27909793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 27909793 is about 5282.9719855400. The cubic root of 27909793 is about 303.3324492454.

The spelling of 27909793 in words is "twenty-seven million, nine hundred nine thousand, seven hundred ninety-three".