5671649 has 2 divisors, whose sum is σ = 5671650. Its totient is φ = 5671648.

The previous prime is 5671621. The next prime is 5671669. The reversal of 5671649 is 9461765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5094049 + 577600 = 2257^2 + 760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5671649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5671609) 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, 2835824 + 2835825.

It is an arithmetic number, because the mean of its divisors is an integer number (2835825).

Almost surely, 2^5671649 is an apocalyptic number.

It is an amenable number.

5671649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5671649 is an equidigital number, since it uses as much as digits as its factorization.

5671649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 5671649 is about 2381.5224122397. The cubic root of 5671649 is about 178.3349435516.

It can be divided in two parts, 56716 and 49, that added together give a palindrome (56765).

The spelling of 5671649 in words is "five million, six hundred seventy-one thousand, six hundred forty-nine".