27720533 has 2 divisors, whose sum is σ = 27720534. Its totient is φ = 27720532.

The previous prime is 27720499. The next prime is 27720571. The reversal of 27720533 is 33502772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24820324 + 2900209 = 4982^2 + 1703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27720533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27720496 and 27720505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27720593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13860266 + 13860267.

It is an arithmetic number, because the mean of its divisors is an integer number (13860267).

Almost surely, 2^27720533 is an apocalyptic number.

It is an amenable number.

27720533 is a deficient number, since it is larger than the sum of its proper divisors (1).

27720533 is an equidigital number, since it uses as much as digits as its factorization.

27720533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 27720533 is about 5265.0292496813. The cubic root of 27720533 is about 302.6452477344.

The spelling of 27720533 in words is "twenty-seven million, seven hundred twenty thousand, five hundred thirty-three".