720533461 has 4 divisors (see below), whose sum is σ = 720628300. Its totient is φ = 720438624.

The previous prime is 720533459. The next prime is 720533497. The reversal of 720533461 is 164335027.

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 124880625 + 595652836 = 11175^2 + 24406^2 .

It is a cyclic number.

It is not a de Polignac number, because 720533461 - 2¹ = 720533459 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 (720533431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34926 + ... + 51583.

It is an arithmetic number, because the mean of its divisors is an integer number (180157075).

Almost surely, 2^720533461 is an apocalyptic number.

It is an amenable number.

720533461 is a deficient number, since it is larger than the sum of its proper divisors (94839).

720533461 is an equidigital number, since it uses as much as digits as its factorization.

720533461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94838.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 720533461 is about 26842.7543482408. The cubic root of 720533461 is about 896.5022515775.

Adding to 720533461 its reverse (164335027), we get a palindrome (884868488).

The spelling of 720533461 in words is "seven hundred twenty million, five hundred thirty-three thousand, four hundred sixty-one".