722473981 has 2 divisors, whose sum is σ = 722473982. Its totient is φ = 722473980.

The previous prime is 722473967. The next prime is 722474009. The reversal of 722473981 is 189374227.

722473981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 539818756 + 182655225 = 23234^2 + 13515^2 .

It is a cyclic number.

It is not a de Polignac number, because 722473981 - 2⁵ = 722473949 is a prime.

It is a super-2 number, since 2×722473981² = 1043937306443976722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722473901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361236990 + 361236991.

It is an arithmetic number, because the mean of its divisors is an integer number (361236991).

Almost surely, 2^722473981 is an apocalyptic number.

It is an amenable number.

722473981 is a deficient number, since it is larger than the sum of its proper divisors (1).

722473981 is an equidigital number, since it uses as much as digits as its factorization.

722473981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 722473981 is about 26878.8761111770. The cubic root of 722473981 is about 897.3063415208.

The spelling of 722473981 in words is "seven hundred twenty-two million, four hundred seventy-three thousand, nine hundred eighty-one".