27963949 has 4 divisors (see below), whose sum is σ = 30115036. Its totient is φ = 25812864.

The previous prime is 27963941. The next prime is 27963959. The reversal of 27963949 is 94936972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16281225 + 11682724 = 4035^2 + 3418^2 .

It is a cyclic number.

It is not a de Polignac number, because 27963949 - 2³ = 27963941 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 (27963941) 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 3 ways as a sum of consecutive naturals, for example, 1075524 + ... + 1075549.

It is an arithmetic number, because the mean of its divisors is an integer number (7528759).

Almost surely, 2^27963949 is an apocalyptic number.

It is an amenable number.

27963949 is a deficient number, since it is larger than the sum of its proper divisors (2151087).

27963949 is a wasteful number, since it uses less digits than its factorization.

27963949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151086.

The product of its digits is 734832, while the sum is 49.

The square root of 27963949 is about 5288.0950256212. The cubic root of 27963949 is about 303.5285173236.

The spelling of 27963949 in words is "twenty-seven million, nine hundred sixty-three thousand, nine hundred forty-nine".