722152009 has 2 divisors, whose sum is σ = 722152010. Its totient is φ = 722152008.

The previous prime is 722152003. The next prime is 722152031. The reversal of 722152009 is 900251227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550934784 + 171217225 = 23472^2 + 13085^2 .

It is a cyclic number.

It is not a de Polignac number, because 722152009 - 2³ = 722152001 is a prime.

It is not a weakly prime, because it can be changed into another prime (722152001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361076004 + 361076005.

It is an arithmetic number, because the mean of its divisors is an integer number (361076005).

Almost surely, 2^722152009 is an apocalyptic number.

It is an amenable number.

722152009 is a deficient number, since it is larger than the sum of its proper divisors (1).

722152009 is an equidigital number, since it uses as much as digits as its factorization.

722152009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 722152009 is about 26872.8861308197. The cubic root of 722152009 is about 897.1730262490.

The spelling of 722152009 in words is "seven hundred twenty-two million, one hundred fifty-two thousand, nine".