720469 has 4 divisors (see below), whose sum is σ = 724396. Its totient is φ = 716544.

The previous prime is 720439. The next prime is 720481. The reversal of 720469 is 964027.

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 280900 + 439569 = 530^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 720469 - 2¹⁹ = 196181 is a prime.

It is a super-2 number, since 2×720469² = 1038151159922, which contains 22 as substring.

It is a Duffinian number.

720469 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674 + ... + 2059.

It is an arithmetic number, because the mean of its divisors is an integer number (181099).

2⁷²⁰⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

720469 is a deficient number, since it is larger than the sum of its proper divisors (3927).

720469 is a wasteful number, since it uses less digits than its factorization.

720469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 720469 is about 848.8044533342. The cubic root of 720469 is about 89.6475516222.

The spelling of 720469 in words is "seven hundred twenty thousand, four hundred sixty-nine".