27289397 has 2 divisors, whose sum is σ = 27289398. Its totient is φ = 27289396.

The previous prime is 27289373. The next prime is 27289433. The reversal of 27289397 is 79398272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14032516 + 13256881 = 3746^2 + 3641^2 .

It is a cyclic number.

It is not a de Polignac number, because 27289397 - 2⁶ = 27289333 is a prime.

It is a super-2 number, since 2×27289397² = 1489422377247218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27289307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13644698 + 13644699.

It is an arithmetic number, because the mean of its divisors is an integer number (13644699).

Almost surely, 2^27289397 is an apocalyptic number.

It is an amenable number.

27289397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27289397 is an equidigital number, since it uses as much as digits as its factorization.

27289397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 27289397 is about 5223.9254397436. The cubic root of 27289397 is about 301.0680339071.

The spelling of 27289397 in words is "twenty-seven million, two hundred eighty-nine thousand, three hundred ninety-seven".