27802013 has 4 divisors (see below), whose sum is σ = 27812928. Its totient is φ = 27791100.

The previous prime is 27802007. The next prime is 27802063. The reversal of 27802013 is 31020872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27802013 - 2⁸ = 27801757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27802013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27802063) 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, 620 + ... + 7482.

It is an arithmetic number, because the mean of its divisors is an integer number (6953232).

Almost surely, 2^27802013 is an apocalyptic number.

It is an amenable number.

27802013 is a deficient number, since it is larger than the sum of its proper divisors (10915).

27802013 is an equidigital number, since it uses as much as digits as its factorization.

27802013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 27802013 is about 5272.7614207358. The cubic root of 27802013 is about 302.9414831792.

Adding to 27802013 its reverse (31020872), we get a palindrome (58822885).

The spelling of 27802013 in words is "twenty-seven million, eight hundred two thousand, thirteen".