27755501 has 2 divisors, whose sum is σ = 27755502. Its totient is φ = 27755500.

The previous prime is 27755473. The next prime is 27755537. The reversal of 27755501 is 10555772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25502500 + 2253001 = 5050^2 + 1501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27755501 is a prime.

It is a super-4 number, since 4×27755501⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27755201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13877750 + 13877751.

It is an arithmetic number, because the mean of its divisors is an integer number (13877751).

Almost surely, 2^27755501 is an apocalyptic number.

It is an amenable number.

27755501 is a deficient number, since it is larger than the sum of its proper divisors (1).

27755501 is an equidigital number, since it uses as much as digits as its factorization.

27755501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 27755501 is about 5268.3489823663. The cubic root of 27755501 is about 302.7724513036.

The spelling of 27755501 in words is "twenty-seven million, seven hundred fifty-five thousand, five hundred one".