722543761 has 4 divisors (see below), whose sum is σ = 760572400. Its totient is φ = 684515124.

The previous prime is 722543747. The next prime is 722543791. The reversal of 722543761 is 167345227.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 167345227 = 7 ⋅23906461.

It is a cyclic number.

It is not a de Polignac number, because 722543761 - 2¹⁵ = 722510993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722543761.

It is not an unprimeable number, because it can be changed into a prime (722543711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19014291 + ... + 19014328.

It is an arithmetic number, because the mean of its divisors is an integer number (190143100).

Almost surely, 2^722543761 is an apocalyptic number.

It is an amenable number.

722543761 is a deficient number, since it is larger than the sum of its proper divisors (38028639).

722543761 is a wasteful number, since it uses less digits than its factorization.

722543761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38028638.

The product of its digits is 70560, while the sum is 37.

The square root of 722543761 is about 26880.1741251801. The cubic root of 722543761 is about 897.3352293065.

Adding to 722543761 its reverse (167345227), we get a palindrome (889888988).

The spelling of 722543761 in words is "seven hundred twenty-two million, five hundred forty-three thousand, seven hundred sixty-one".