27431693 has 8 divisors (see below), whose sum is σ = 29107512. Its totient is φ = 25762816.

The previous prime is 27431671. The next prime is 27431699. The reversal of 27431693 is 39613472.

It can be written as a sum of positive squares in 4 ways, for example, as 162409 + 27269284 = 403^2 + 5222^2 .

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 27431693 - 2⁶ = 27431629 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 (27431699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8021 + ... + 10917.

It is an arithmetic number, because the mean of its divisors is an integer number (3638439).

Almost surely, 2^27431693 is an apocalyptic number.

It is an amenable number.

27431693 is a deficient number, since it is larger than the sum of its proper divisors (1675819).

27431693 is a wasteful number, since it uses less digits than its factorization.

27431693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471.

The product of its digits is 27216, while the sum is 35.

The square root of 27431693 is about 5237.5273746301. The cubic root of 27431693 is about 301.5904166465.

The spelling of 27431693 in words is "twenty-seven million, four hundred thirty-one thousand, six hundred ninety-three".