27699993 has 12 divisors (see below), whose sum is σ = 40066260. Its totient is φ = 18441216.

The previous prime is 27699977. The next prime is 27700003. The reversal of 27699993 is 39999672.

It can be written as a sum of positive squares in 2 ways, for example, as 11923209 + 15776784 = 3453^2 + 3972^2 .

It is not a de Polignac number, because 27699993 - 2⁴ = 27699977 is a prime.

It is a super-2 number, since 2×27699993² = 1534579224400098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27699913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6705 + ... + 10017.

It is an arithmetic number, because the mean of its divisors is an integer number (3338855).

Almost surely, 2^27699993 is an apocalyptic number.

It is an amenable number.

27699993 is a deficient number, since it is larger than the sum of its proper divisors (12366267).

27699993 is a wasteful number, since it uses less digits than its factorization.

27699993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248 (or 4245 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 27699993 is about 5263.0782817663. The cubic root of 27699993 is about 302.5704792179.

The spelling of 27699993 in words is "twenty-seven million, six hundred ninety-nine thousand, nine hundred ninety-three".