27953129 has 4 divisors (see below), whose sum is σ = 28917060. Its totient is φ = 26989200.

The previous prime is 27953099. The next prime is 27953171. The reversal of 27953129 is 92135972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13875625 + 14077504 = 3725^2 + 3752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27953129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27953092 and 27953101.

It is not an unprimeable number, because it can be changed into a prime (27953179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481922 + ... + 481979.

It is an arithmetic number, because the mean of its divisors is an integer number (7229265).

Almost surely, 2^27953129 is an apocalyptic number.

27953129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27953129 is a deficient number, since it is larger than the sum of its proper divisors (963931).

27953129 is an equidigital number, since it uses as much as digits as its factorization.

27953129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963930.

The product of its digits is 34020, while the sum is 38.

The square root of 27953129 is about 5287.0718739204. The cubic root of 27953129 is about 303.4893645055.

It can be divided in two parts, 27953 and 129, that added together give a palindrome (28082).

The spelling of 27953129 in words is "twenty-seven million, nine hundred fifty-three thousand, one hundred twenty-nine".