729361121 has 4 divisors (see below), whose sum is σ = 729452544. Its totient is φ = 729269700.

The previous prime is 729361103. The next prime is 729361133. The reversal of 729361121 is 121163927.

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 a cyclic number.

It is not a de Polignac number, because 729361121 - 2²⁶ = 662252257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729361021) 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, 32465 + ... + 50126.

It is an arithmetic number, because the mean of its divisors is an integer number (182363136).

Almost surely, 2^729361121 is an apocalyptic number.

It is an amenable number.

729361121 is a deficient number, since it is larger than the sum of its proper divisors (91423).

729361121 is an equidigital number, since it uses as much as digits as its factorization.

729361121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91422.

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

The square root of 729361121 is about 27006.6865979520. The cubic root of 729361121 is about 900.1485849331.

The spelling of 729361121 in words is "seven hundred twenty-nine million, three hundred sixty-one thousand, one hundred twenty-one".