27939999 has 4 divisors (see below), whose sum is σ = 37253336. Its totient is φ = 18626664.

The previous prime is 27939997. The next prime is 27940039. The reversal of 27939999 is 99993972.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 27939999 - 2¹ = 27939997 is a prime.

It is a Duffinian number.

27939999 is a modest number, since divided by 9999 gives 2793 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27939997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4656664 + ... + 4656669.

It is an arithmetic number, because the mean of its divisors is an integer number (9313334).

Almost surely, 2^27939999 is an apocalyptic number.

27939999 is a deficient number, since it is larger than the sum of its proper divisors (9313337).

27939999 is an equidigital number, since it uses as much as digits as its factorization.

27939999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313336.

The product of its digits is 2480058, while the sum is 57.

The square root of 27939999 is about 5285.8300199685. The cubic root of 27939999 is about 303.4418392424.

The spelling of 27939999 in words is "twenty-seven million, nine hundred thirty-nine thousand, nine hundred ninety-nine".