27902129 has 2 divisors, whose sum is σ = 27902130. Its totient is φ = 27902128.

The previous prime is 27902113. The next prime is 27902183. The reversal of 27902129 is 92120972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 12061729 = 3980^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 27902129 - 2⁴ = 27902113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27902095 and 27902104.

It is not a weakly prime, because it can be changed into another prime (27902029) 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, 13951064 + 13951065.

It is an arithmetic number, because the mean of its divisors is an integer number (13951065).

Almost surely, 2^27902129 is an apocalyptic number.

It is an amenable number.

27902129 is a deficient number, since it is larger than the sum of its proper divisors (1).

27902129 is an equidigital number, since it uses as much as digits as its factorization.

27902129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 27902129 is about 5282.2465864441. The cubic root of 27902129 is about 303.3046817790.

The spelling of 27902129 in words is "twenty-seven million, nine hundred two thousand, one hundred twenty-nine".