27992417 has 2 divisors, whose sum is σ = 27992418. Its totient is φ = 27992416.

The previous prime is 27992407. The next prime is 27992429. The reversal of 27992417 is 71429972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19088161 + 8904256 = 4369^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 27992417 - 2⁸ = 27992161 is a prime.

It is not a weakly prime, because it can be changed into another prime (27992407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13996208 + 13996209.

It is an arithmetic number, because the mean of its divisors is an integer number (13996209).

Almost surely, 2^27992417 is an apocalyptic number.

It is an amenable number.

27992417 is a deficient number, since it is larger than the sum of its proper divisors (1).

27992417 is an equidigital number, since it uses as much as digits as its factorization.

27992417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 27992417 is about 5290.7860474602. The cubic root of 27992417 is about 303.6314822671.

The spelling of 27992417 in words is "twenty-seven million, nine hundred ninety-two thousand, four hundred seventeen".