27729349 has 2 divisors, whose sum is σ = 27729350. Its totient is φ = 27729348.

The previous prime is 27729323. The next prime is 27729353. The reversal of 27729349 is 94392772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 7317025 = 4518^2 + 2705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27729349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27729649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864674 + 13864675.

It is an arithmetic number, because the mean of its divisors is an integer number (13864675).

Almost surely, 2^27729349 is an apocalyptic number.

It is an amenable number.

27729349 is a deficient number, since it is larger than the sum of its proper divisors (1).

27729349 is an equidigital number, since it uses as much as digits as its factorization.

27729349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 27729349 is about 5265.8664054455. The cubic root of 27729349 is about 302.6773278981.

It can be divided in two parts, 2772 and 9349, that added together give a palindrome (12121).

The spelling of 27729349 in words is "twenty-seven million, seven hundred twenty-nine thousand, three hundred forty-nine".