730861 has 4 divisors (see below), whose sum is σ = 750652. Its totient is φ = 711072.

The previous prime is 730853. The next prime is 730867. The reversal of 730861 is 168037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 448900 + 281961 = 670^2 + 531^2 .

It is a cyclic number.

It is not a de Polignac number, because 730861 - 2³ = 730853 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 (730867) 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, 9840 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (187663).

2⁷³⁰⁸⁶¹ is an apocalyptic number.

It is an amenable number.

730861 is a deficient number, since it is larger than the sum of its proper divisors (19791).

730861 is a wasteful number, since it uses less digits than its factorization.

730861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19790.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 730861 is about 854.9040881877. The cubic root of 730861 is about 90.0765192859.

Adding to 730861 its reverse (168037), we get a palindrome (898898).

The spelling of 730861 in words is "seven hundred thirty thousand, eight hundred sixty-one".