5661739 has 2 divisors, whose sum is σ = 5661740. Its totient is φ = 5661738.

The previous prime is 5661727. The next prime is 5661743. The reversal of 5661739 is 9371665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661739 - 2¹⁷ = 5530667 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 5661698 and 5661707.

It is not a weakly prime, because it can be changed into another prime (5661779) 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, 2830869 + 2830870.

It is an arithmetic number, because the mean of its divisors is an integer number (2830870).

Almost surely, 2^5661739 is an apocalyptic number.

5661739 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661739 is an equidigital number, since it uses as much as digits as its factorization.

5661739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 5661739 is about 2379.4409007160. The cubic root of 5661739 is about 178.2310155395.

It can be divided in two parts, 5661 and 739, that added together give a square (6400 = 80²).

The spelling of 5661739 in words is "five million, six hundred sixty-one thousand, seven hundred thirty-nine".