730661 has 8 divisors (see below), whose sum is σ = 762048. Its totient is φ = 700000.

The previous prime is 730637. The next prime is 730663. The reversal of 730661 is 166037.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(730661) divides (730661-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 730661 - 2¹⁰ = 729637 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 (730663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2786 + ... + 3036.

It is an arithmetic number, because the mean of its divisors is an integer number (95256).

2⁷³⁰⁶⁶¹ is an apocalyptic number.

730661 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

730661 is a deficient number, since it is larger than the sum of its proper divisors (31387).

730661 is a wasteful number, since it uses less digits than its factorization.

730661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 730661 is about 854.7871079982. The cubic root of 730661 is about 90.0683020611.

Adding to 730661 its reverse (166037), we get a palindrome (896698).

The spelling of 730661 in words is "seven hundred thirty thousand, six hundred sixty-one".