27917005 has 8 divisors (see below), whose sum is σ = 33597432. Its totient is φ = 22268928.

The previous prime is 27916979. The next prime is 27917033. The reversal of 27917005 is 50071972.

It can be written as a sum of positive squares in 4 ways, for example, as 6405961 + 21511044 = 2531^2 + 4638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27917005 - 2¹³ = 27908813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6144 + ... + 9673.

It is an arithmetic number, because the mean of its divisors is an integer number (4199679).

Almost surely, 2^27917005 is an apocalyptic number.

It is an amenable number.

27917005 is a deficient number, since it is larger than the sum of its proper divisors (5680427).

27917005 is a wasteful number, since it uses less digits than its factorization.

27917005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16175.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 27917005 is about 5283.6545117939. The cubic root of 27917005 is about 303.3585744268.

Adding to 27917005 its reverse (50071972), we get a palindrome (77988977).

The spelling of 27917005 in words is "twenty-seven million, nine hundred seventeen thousand, five".