27831949 has 2 divisors, whose sum is σ = 27831950. Its totient is φ = 27831948.

The previous prime is 27831931. The next prime is 27831983. The reversal of 27831949 is 94913872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 59049 = 5270^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 27831949 - 2⁵ = 27831917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27838949) 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, 13915974 + 13915975.

It is an arithmetic number, because the mean of its divisors is an integer number (13915975).

Almost surely, 2^27831949 is an apocalyptic number.

It is an amenable number.

27831949 is a deficient number, since it is larger than the sum of its proper divisors (1).

27831949 is an equidigital number, since it uses as much as digits as its factorization.

27831949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 27831949 is about 5275.5993972249. The cubic root of 27831949 is about 303.0501755869.

The spelling of 27831949 in words is "twenty-seven million, eight hundred thirty-one thousand, nine hundred forty-nine".