722381977 has 2 divisors, whose sum is σ = 722381978. Its totient is φ = 722381976.

The previous prime is 722381971. The next prime is 722382049. The reversal of 722381977 is 779183227.

It is a happy number.

722381977 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., 534719376 + 187662601 = 23124^2 + 13699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722381977 is a prime.

It is not a weakly prime, because it can be changed into another prime (722381971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361190988 + 361190989.

It is an arithmetic number, because the mean of its divisors is an integer number (361190989).

Almost surely, 2^722381977 is an apocalyptic number.

It is an amenable number.

722381977 is a deficient number, since it is larger than the sum of its proper divisors (1).

722381977 is an equidigital number, since it uses as much as digits as its factorization.

722381977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 722381977 is about 26877.1646012000. The cubic root of 722381977 is about 897.2682505170.

The spelling of 722381977 in words is "seven hundred twenty-two million, three hundred eighty-one thousand, nine hundred seventy-seven".