726324321 has 4 divisors (see below), whose sum is σ = 968432432. Its totient is φ = 484216212.

The previous prime is 726324293. The next prime is 726324331. The reversal of 726324321 is 123423627.

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 not a de Polignac number, because 726324321 - 2⁵ = 726324289 is a prime.

It is a super-2 number, since 2×726324321² = 1055094038552222082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726324331) 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, 121054051 + ... + 121054056.

It is an arithmetic number, because the mean of its divisors is an integer number (242108108).

Almost surely, 2^726324321 is an apocalyptic number.

It is an amenable number.

726324321 is a deficient number, since it is larger than the sum of its proper divisors (242108111).

726324321 is a wasteful number, since it uses less digits than its factorization.

726324321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242108110.

The product of its digits is 12096, while the sum is 30.

The square root of 726324321 is about 26950.4048392598. The cubic root of 726324321 is about 898.8975476365.

Adding to 726324321 its reverse (123423627), we get a palindrome (849747948).

The spelling of 726324321 in words is "seven hundred twenty-six million, three hundred twenty-four thousand, three hundred twenty-one".