730687 has 4 divisors (see below), whose sum is σ = 762480. Its totient is φ = 698896.

The previous prime is 730679. The next prime is 730727. The reversal of 730687 is 786037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786037 = 7 ⋅112291.

It is a cyclic number.

It is not a de Polignac number, because 730687 - 2³ = 730679 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730637) 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, 15862 + ... + 15907.

It is an arithmetic number, because the mean of its divisors is an integer number (190620).

2⁷³⁰⁶⁸⁷ is an apocalyptic number.

730687 is a deficient number, since it is larger than the sum of its proper divisors (31793).

730687 is a wasteful number, since it uses less digits than its factorization.

730687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31792.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 730687 is about 854.8023163282. The cubic root of 730687 is about 90.0693703851.

The spelling of 730687 in words is "seven hundred thirty thousand, six hundred eighty-seven".