27490213 has 4 divisors (see below), whose sum is σ = 28160748. Its totient is φ = 26819680.

The previous prime is 27490193. The next prime is 27490217. The reversal of 27490213 is 31209472.

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 15539364 + 11950849 = 3942^2 + 3457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27490213 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 (27490217) 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, 335206 + ... + 335287.

It is an arithmetic number, because the mean of its divisors is an integer number (7040187).

Almost surely, 2^27490213 is an apocalyptic number.

It is an amenable number.

27490213 is a deficient number, since it is larger than the sum of its proper divisors (670535).

27490213 is an equidigital number, since it uses as much as digits as its factorization.

27490213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670534.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 27490213 is about 5243.1110039746. Note that the first 3 decimals coincide. The cubic root of 27490213 is about 301.8047251568.

Adding to 27490213 its reverse (31209472), we get a palindrome (58699685).

The spelling of 27490213 in words is "twenty-seven million, four hundred ninety thousand, two hundred thirteen".