27722137 has 4 divisors (see below), whose sum is σ = 27740880. Its totient is φ = 27703396.

The previous prime is 27722131. The next prime is 27722147. The reversal of 27722137 is 73122772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27722137 - 2³ = 27722129 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27722099 and 27722108.

It is not an unprimeable number, because it can be changed into a prime (27722131) 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 in 3 ways as a sum of consecutive naturals, for example, 6943 + ... + 10180.

It is an arithmetic number, because the mean of its divisors is an integer number (6935220).

Almost surely, 2^27722137 is an apocalyptic number.

It is an amenable number.

27722137 is a deficient number, since it is larger than the sum of its proper divisors (18743).

27722137 is a wasteful number, since it uses less digits than its factorization.

27722137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18742.

The product of its digits is 8232, while the sum is 31.

The square root of 27722137 is about 5265.1815733173. The cubic root of 27722137 is about 302.6510849672.

The spelling of 27722137 in words is "twenty-seven million, seven hundred twenty-two thousand, one hundred thirty-seven".