5651749 has 2 divisors, whose sum is σ = 5651750. Its totient is φ = 5651748.

The previous prime is 5651747. The next prime is 5651771. The reversal of 5651749 is 9471565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5313025 + 338724 = 2305^2 + 582^2 .

It is a cyclic number.

It is not a de Polignac number, because 5651749 - 2¹ = 5651747 is a prime.

Together with 5651747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5651741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825874 + 2825875.

It is an arithmetic number, because the mean of its divisors is an integer number (2825875).

Almost surely, 2^5651749 is an apocalyptic number.

It is an amenable number.

5651749 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651749 is an equidigital number, since it uses as much as digits as its factorization.

5651749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 5651749 is about 2377.3407412485. The cubic root of 5651749 is about 178.1261257341.

It can be divided in two parts, 5651 and 749, that added together give a square (6400 = 80²).

The spelling of 5651749 in words is "five million, six hundred fifty-one thousand, seven hundred forty-nine".