5649749 has 6 divisors (see below), whose sum is σ = 6572214. Its totient is φ = 4842600.

The previous prime is 5649739. The next prime is 5649757. The reversal of 5649749 is 9479465.

It can be written as a sum of positive squares in only one way, i.e., 5207524 + 442225 = 2282^2 + 665^2 .

It is not a de Polignac number, because 5649749 - 2⁴ = 5649733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5649739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57602 + ... + 57699.

It is an arithmetic number, because the mean of its divisors is an integer number (1095369).

Almost surely, 2^5649749 is an apocalyptic number.

It is an amenable number.

5649749 is a deficient number, since it is larger than the sum of its proper divisors (922465).

5649749 is a wasteful number, since it uses less digits than its factorization.

5649749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115315 (or 115308 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 5649749 is about 2376.9200659677. The cubic root of 5649749 is about 178.1051119275.

The spelling of 5649749 in words is "five million, six hundred forty-nine thousand, seven hundred forty-nine".