27474947 has 2 divisors, whose sum is σ = 27474948. Its totient is φ = 27474946.

The previous prime is 27474917. The next prime is 27474971. The reversal of 27474947 is 74947472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27474947 - 2¹⁶ = 27409411 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 27474898 and 27474907.

It is not a weakly prime, because it can be changed into another prime (27474917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13737473 + 13737474.

It is an arithmetic number, because the mean of its divisors is an integer number (13737474).

Almost surely, 2^27474947 is an apocalyptic number.

27474947 is a deficient number, since it is larger than the sum of its proper divisors (1).

27474947 is an equidigital number, since it uses as much as digits as its factorization.

27474947 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 27474947 is about 5241.6549867384. The cubic root of 27474947 is about 301.7488482519.

The spelling of 27474947 in words is "twenty-seven million, four hundred seventy-four thousand, nine hundred forty-seven".