27797389 has 2 divisors, whose sum is σ = 27797390. Its totient is φ = 27797388.

The previous prime is 27797381. The next prime is 27797411. The reversal of 27797389 is 98379772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 1357225 = 5142^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 27797389 - 2³ = 27797381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27797381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13898694 + 13898695.

It is an arithmetic number, because the mean of its divisors is an integer number (13898695).

Almost surely, 2^27797389 is an apocalyptic number.

It is an amenable number.

27797389 is a deficient number, since it is larger than the sum of its proper divisors (1).

27797389 is an equidigital number, since it uses as much as digits as its factorization.

27797389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 27797389 is about 5272.3229225836. The cubic root of 27797389 is about 302.9246872840.

The spelling of 27797389 in words is "twenty-seven million, seven hundred ninety-seven thousand, three hundred eighty-nine".