27917397 has 12 divisors (see below), whose sum is σ = 40404780. Its totient is φ = 18574848.

The previous prime is 27917387. The next prime is 27917411. The reversal of 27917397 is 79371972.

It can be written as a sum of positive squares in 2 ways, for example, as 3651921 + 24265476 = 1911^2 + 4926^2 .

It is not a de Polignac number, because 27917397 - 2¹⁰ = 27916373 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27917387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2229 + ... + 7797.

It is an arithmetic number, because the mean of its divisors is an integer number (3367065).

Almost surely, 2^27917397 is an apocalyptic number.

27917397 is the 3342-nd heptagonal number.

It is an amenable number.

27917397 is a deficient number, since it is larger than the sum of its proper divisors (12487383).

27917397 is a wasteful number, since it uses less digits than its factorization.

27917397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132 (or 6129 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 27917397 is about 5283.6916072004. The cubic root of 27917397 is about 303.3599943022.

The spelling of 27917397 in words is "twenty-seven million, nine hundred seventeen thousand, three hundred ninety-seven".