27969129 has 12 divisors (see below), whose sum is σ = 40497600. Its totient is φ = 18600984.

The previous prime is 27969119. The next prime is 27969133. The reversal of 27969129 is 92196972.

It is not a de Polignac number, because 27969129 - 2⁴ = 27969113 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27969119) 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 in 11 ways as a sum of consecutive naturals, for example, 412 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (3374800).

Almost surely, 2^27969129 is an apocalyptic number.

It is an amenable number.

27969129 is a deficient number, since it is larger than the sum of its proper divisors (12528471).

27969129 is a wasteful number, since it uses less digits than its factorization.

27969129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524 (or 7521 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 27969129 is about 5288.5847823402. The cubic root of 27969129 is about 303.5472578890.

The spelling of 27969129 in words is "twenty-seven million, nine hundred sixty-nine thousand, one hundred twenty-nine".