27431357 has 2 divisors, whose sum is σ = 27431358. Its totient is φ = 27431356.

The previous prime is 27431351. The next prime is 27431381. The reversal of 27431357 is 75313472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 11519236 = 3989^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 27431357 - 2⁶ = 27431293 is a prime.

It is a super-2 number, since 2×27431357² = 1504958693722898, 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 (27431351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13715678 + 13715679.

It is an arithmetic number, because the mean of its divisors is an integer number (13715679).

Almost surely, 2^27431357 is an apocalyptic number.

It is an amenable number.

27431357 is a deficient number, since it is larger than the sum of its proper divisors (1).

27431357 is an equidigital number, since it uses as much as digits as its factorization.

27431357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 27431357 is about 5237.4952983272. The cubic root of 27431357 is about 301.5891852874.

The spelling of 27431357 in words is "twenty-seven million, four hundred thirty-one thousand, three hundred fifty-seven".