722381629 has 4 divisors (see below), whose sum is σ = 764874684. Its totient is φ = 679888576.

The previous prime is 722381617. The next prime is 722381657. The reversal of 722381629 is 926183227.

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 649740100 + 72641529 = 25490^2 + 8523^2 .

It is a cyclic number.

It is not a de Polignac number, because 722381629 - 2¹⁹ = 721857341 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722381591 and 722381600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722381659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21246502 + ... + 21246535.

It is an arithmetic number, because the mean of its divisors is an integer number (191218671).

Almost surely, 2^722381629 is an apocalyptic number.

It is an amenable number.

722381629 is a deficient number, since it is larger than the sum of its proper divisors (42493055).

722381629 is a wasteful number, since it uses less digits than its factorization.

722381629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42493054.

The product of its digits is 72576, while the sum is 40.

The square root of 722381629 is about 26877.1581273021. The cubic root of 722381629 is about 897.2681064338.

The spelling of 722381629 in words is "seven hundred twenty-two million, three hundred eighty-one thousand, six hundred twenty-nine".