27713621 has 16 divisors (see below), whose sum is σ = 31978800. Its totient is φ = 23789568.

The previous prime is 27713611. The next prime is 27713633. The reversal of 27713621 is 12631772.

It can be written as a sum of positive squares in 8 ways, for example, as 7562500 + 20151121 = 2750^2 + 4489^2 .

It is a cyclic number.

It is not a de Polignac number, because 27713621 - 2⁶ = 27713557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27713611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18965 + ... + 20373.

It is an arithmetic number, because the mean of its divisors is an integer number (1998675).

Almost surely, 2^27713621 is an apocalyptic number.

It is an amenable number.

27713621 is a deficient number, since it is larger than the sum of its proper divisors (4265179).

27713621 is a wasteful number, since it uses less digits than its factorization.

27713621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528.

The product of its digits is 3528, while the sum is 29.

The square root of 27713621 is about 5264.3728021484. The cubic root of 27713621 is about 302.6200911974.

The spelling of 27713621 in words is "twenty-seven million, seven hundred thirteen thousand, six hundred twenty-one".