722147329 has 2 divisors, whose sum is σ = 722147330. Its totient is φ = 722147328.

The previous prime is 722147323. The next prime is 722147351. The reversal of 722147329 is 923741227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648873729 + 73273600 = 25473^2 + 8560^2 .

It is a cyclic number.

It is not a de Polignac number, because 722147329 - 2⁵ = 722147297 is a prime.

It is not a weakly prime, because it can be changed into another prime (722147323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361073664 + 361073665.

It is an arithmetic number, because the mean of its divisors is an integer number (361073665).

Almost surely, 2^722147329 is an apocalyptic number.

It is an amenable number.

722147329 is a deficient number, since it is larger than the sum of its proper divisors (1).

722147329 is an equidigital number, since it uses as much as digits as its factorization.

722147329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 722147329 is about 26872.7990540621. The cubic root of 722147329 is about 897.1710881626.

The spelling of 722147329 in words is "seven hundred twenty-two million, one hundred forty-seven thousand, three hundred twenty-nine".