709749 has 16 divisors (see below), whose sum is σ = 1066240. Its totient is φ = 466560.

The previous prime is 709741. The next prime is 709769. The reversal of 709749 is 947907.

It is not a de Polignac number, because 709749 - 2³ = 709741 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 (709741) 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 15 ways as a sum of consecutive naturals, for example, 2484 + ... + 2754.

It is an arithmetic number, because the mean of its divisors is an integer number (66640).

2⁷⁰⁹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

709749 is a deficient number, since it is larger than the sum of its proper divisors (356491).

709749 is a wasteful number, since it uses less digits than its factorization.

709749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 709749 is about 842.4660230537. The cubic root of 709749 is about 89.2007001225.

The spelling of 709749 in words is "seven hundred nine thousand, seven hundred forty-nine".