722534409 has 12 divisors (see below), whose sum is σ = 1071868356. Its totient is φ = 468670752.

The previous prime is 722534401. The next prime is 722534419. The reversal of 722534409 is 904435227.

It can be written as a sum of positive squares in 2 ways, for example, as 646583184 + 75951225 = 25428^2 + 8715^2 .

It is not a de Polignac number, because 722534409 - 2³ = 722534401 is a prime.

It is a super-3 number, since 3×722534409³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722534401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1084554 + ... + 1085219.

It is an arithmetic number, because the mean of its divisors is an integer number (89322363).

Almost surely, 2^722534409 is an apocalyptic number.

It is an amenable number.

722534409 is a deficient number, since it is larger than the sum of its proper divisors (349333947).

722534409 is a wasteful number, since it uses less digits than its factorization.

722534409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169816 (or 2169813 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 722534409 is about 26880.0001674107. Note that the first 3 decimals coincide. The cubic root of 722534409 is about 897.3313578385.

The spelling of 722534409 in words is "seven hundred twenty-two million, five hundred thirty-four thousand, four hundred nine".