4309749 has 6 divisors (see below), whose sum is σ = 6225206. Its totient is φ = 2873160.

The previous prime is 4309741. The next prime is 4309757. The reversal of 4309749 is 9479034.

It is an interprime number because it is at equal distance from previous prime (4309741) and next prime (4309757).

It can be written as a sum of positive squares in only one way, i.e., 3175524 + 1134225 = 1782^2 + 1065^2 .

It is not a de Polignac number, because 4309749 - 2³ = 4309741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4309741) 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 in 5 ways as a sum of consecutive naturals, for example, 239422 + ... + 239439.

Almost surely, 2^4309749 is an apocalyptic number.

It is an amenable number.

4309749 is a deficient number, since it is larger than the sum of its proper divisors (1915457).

4309749 is a wasteful number, since it uses less digits than its factorization.

4309749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478867 (or 478864 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 4309749 is about 2075.9934970996. The cubic root of 4309749 is about 162.7361332307.

The spelling of 4309749 in words is "four million, three hundred nine thousand, seven hundred forty-nine".