27957229 has 2 divisors, whose sum is σ = 27957230. Its totient is φ = 27957228.

The previous prime is 27957221. The next prime is 27957233. The reversal of 27957229 is 92275972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 12236004 = 3965^2 + 3498^2 .

It is a cyclic number.

It is not a de Polignac number, because 27957229 - 2³ = 27957221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27957221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13978614 + 13978615.

It is an arithmetic number, because the mean of its divisors is an integer number (13978615).

Almost surely, 2^27957229 is an apocalyptic number.

It is an amenable number.

27957229 is a deficient number, since it is larger than the sum of its proper divisors (1).

27957229 is an equidigital number, since it uses as much as digits as its factorization.

27957229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 27957229 is about 5287.4595979544. The cubic root of 27957229 is about 303.5042017898.

The spelling of 27957229 in words is "twenty-seven million, nine hundred fifty-seven thousand, two hundred twenty-nine".