727130321 has 4 divisors (see below), whose sum is σ = 727199232. Its totient is φ = 727061412.

The previous prime is 727130269. The next prime is 727130353. The reversal of 727130321 is 123031727.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 727130321 - 2²² = 722936017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727130821) 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, 14945 + ... + 40958.

It is an arithmetic number, because the mean of its divisors is an integer number (181799808).

Almost surely, 2^727130321 is an apocalyptic number.

It is an amenable number.

727130321 is a deficient number, since it is larger than the sum of its proper divisors (68911).

727130321 is a wasteful number, since it uses less digits than its factorization.

727130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68910.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 727130321 is about 26965.3540863086. The cubic root of 727130321 is about 899.2299260573.

The spelling of 727130321 in words is "seven hundred twenty-seven million, one hundred thirty thousand, three hundred twenty-one".