27972773 has 2 divisors, whose sum is σ = 27972774. Its totient is φ = 27972772.

The previous prime is 27972767. The next prime is 27972781. The reversal of 27972773 is 37727972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 494209 = 5242^2 + 703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27972773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27972713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13986386 + 13986387.

It is an arithmetic number, because the mean of its divisors is an integer number (13986387).

Almost surely, 2^27972773 is an apocalyptic number.

It is an amenable number.

27972773 is a deficient number, since it is larger than the sum of its proper divisors (1).

27972773 is an equidigital number, since it uses as much as digits as its factorization.

27972773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259308, while the sum is 44.

The square root of 27972773 is about 5288.9292867271. The cubic root of 27972773 is about 303.5604400201.

The spelling of 27972773 in words is "twenty-seven million, nine hundred seventy-two thousand, seven hundred seventy-three".