729149 has 4 divisors (see below), whose sum is σ = 736764. Its totient is φ = 721536.

The previous prime is 729143. The next prime is 729173. The reversal of 729149 is 941927.

729149 = 492² + 493² + 494².

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 532900 + 196249 = 730^2 + 443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729149 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 (729143) 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, 3662 + ... + 3855.

It is an arithmetic number, because the mean of its divisors is an integer number (184191).

2⁷²⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

729149 is a deficient number, since it is larger than the sum of its proper divisors (7615).

729149 is an equidigital number, since it uses as much as digits as its factorization.

729149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614.

The product of its digits is 4536, while the sum is 32.

The square root of 729149 is about 853.9022192265. The cubic root of 729149 is about 90.0061312695.

It can be divided in two parts, 729 and 149, that added together give a palindrome (878).

The spelling of 729149 in words is "seven hundred twenty-nine thousand, one hundred forty-nine".