27672129 has 6 divisors (see below), whose sum is σ = 39970866. Its totient is φ = 18448080.

The previous prime is 27672103. The next prime is 27672187. The reversal of 27672129 is 92127672.

It can be written as a sum of positive squares in only one way, i.e., 26625600 + 1046529 = 5160^2 + 1023^2 .

It is not a de Polignac number, because 27672129 - 2⁹ = 27671617 is a prime.

It is a super-3 number, since 3×27672129³ (a number of 23 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27672093 and 27672102.

It is not an unprimeable number, because it can be changed into a prime (27672629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1537332 + ... + 1537349.

It is an arithmetic number, because the mean of its divisors is an integer number (6661811).

Almost surely, 2^27672129 is an apocalyptic number.

It is an amenable number.

27672129 is a deficient number, since it is larger than the sum of its proper divisors (12298737).

27672129 is a wasteful number, since it uses less digits than its factorization.

27672129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074687 (or 3074684 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 27672129 is about 5260.4304956914. The cubic root of 27672129 is about 302.4689911980.

The spelling of 27672129 in words is "twenty-seven million, six hundred seventy-two thousand, one hundred twenty-nine".