722997953 has 2 divisors, whose sum is σ = 722997954. Its totient is φ = 722997952.

The previous prime is 722997949. The next prime is 722997959. The reversal of 722997953 is 359799227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708198544 + 14799409 = 26612^2 + 3847^2 .

It is an emirp because it is prime and its reverse (359799227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722997953 - 2² = 722997949 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 722997895 and 722997904.

It is not a weakly prime, because it can be changed into another prime (722997959) 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 as a sum of consecutive naturals, namely, 361498976 + 361498977.

It is an arithmetic number, because the mean of its divisors is an integer number (361498977).

Almost surely, 2^722997953 is an apocalyptic number.

It is an amenable number.

722997953 is a deficient number, since it is larger than the sum of its proper divisors (1).

722997953 is an equidigital number, since it uses as much as digits as its factorization.

722997953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 53.

The square root of 722997953 is about 26888.6212550960. The cubic root of 722997953 is about 897.5232119756.

The spelling of 722997953 in words is "seven hundred twenty-two million, nine hundred ninety-seven thousand, nine hundred fifty-three".