27722977 has 4 divisors (see below), whose sum is σ = 27740356. Its totient is φ = 27705600.

The previous prime is 27722941. The next prime is 27722987. The reversal of 27722977 is 77922772.

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 21123216 + 6599761 = 4596^2 + 2569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27722977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27722987) 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, 6024 + ... + 9577.

It is an arithmetic number, because the mean of its divisors is an integer number (6935089).

Almost surely, 2^27722977 is an apocalyptic number.

It is an amenable number.

27722977 is a deficient number, since it is larger than the sum of its proper divisors (17379).

27722977 is a wasteful number, since it uses less digits than its factorization.

27722977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17378.

The product of its digits is 172872, while the sum is 43.

The square root of 27722977 is about 5265.2613420418. The cubic root of 27722977 is about 302.6541417824.

The spelling of 27722977 in words is "twenty-seven million, seven hundred twenty-two thousand, nine hundred seventy-seven".