27474749 has 2 divisors, whose sum is σ = 27474750. Its totient is φ = 27474748.

The previous prime is 27474731. The next prime is 27474751. The reversal of 27474749 is 94747472.

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., 14822500 + 12652249 = 3850^2 + 3557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27474749 is a prime.

It is a super-2 number, since 2×27474749² = 1509723665226002, which contains 22 as substring.

Together with 27474751, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27471749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13737374 + 13737375.

It is an arithmetic number, because the mean of its divisors is an integer number (13737375).

Almost surely, 2^27474749 is an apocalyptic number.

It is an amenable number.

27474749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27474749 is an equidigital number, since it uses as much as digits as its factorization.

27474749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 44.

The square root of 27474749 is about 5241.6360995399. The cubic root of 27474749 is about 301.7481233926.

Adding to 27474749 its reverse (94747472), we get a palindrome (122222221).

The spelling of 27474749 in words is "twenty-seven million, four hundred seventy-four thousand, seven hundred forty-nine".