730749 has 4 divisors (see below), whose sum is σ = 974336. Its totient is φ = 487164.

The previous prime is 730747. The next prime is 730753. The reversal of 730749 is 947037.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 730749 - 2¹ = 730747 is a prime.

It is a D-number.

It is a Duffinian number.

730749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121789 + ... + 121794.

It is an arithmetic number, because the mean of its divisors is an integer number (243584).

2⁷³⁰⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

730749 is a deficient number, since it is larger than the sum of its proper divisors (243587).

730749 is a wasteful number, since it uses less digits than its factorization.

730749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243586.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 730749 is about 854.8385812538. The cubic root of 730749 is about 90.0719178247.

The spelling of 730749 in words is "seven hundred thirty thousand, seven hundred forty-nine".