722222779 has 8 divisors (see below), whose sum is σ = 747499520. Its totient is φ = 697069800.

The previous prime is 722222771. The next prime is 722222789. The reversal of 722222779 is 977222227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722222779 - 2³ = 722222771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722222771) 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 7 ways as a sum of consecutive naturals, for example, 18987 + ... + 42484.

It is an arithmetic number, because the mean of its divisors is an integer number (93437440).

Almost surely, 2^722222779 is an apocalyptic number.

722222779 is a deficient number, since it is larger than the sum of its proper divisors (25276741).

722222779 is a wasteful number, since it uses less digits than its factorization.

722222779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61881.

The product of its digits is 98784, while the sum is 40.

The square root of 722222779 is about 26874.2028532941. The cubic root of 722222779 is about 897.2023325724.

The spelling of 722222779 in words is "seven hundred twenty-two million, two hundred twenty-two thousand, seven hundred seventy-nine".