1628073217 has 2 divisors, whose sum is σ = 1628073218. Its totient is φ = 1628073216.

The previous prime is 1628073211. The next prime is 1628073241. The reversal of 1628073217 is 7123708261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1594884096 + 33189121 = 39936^2 + 5761^2 .

It is an emirp because it is prime and its reverse (7123708261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1628073217 - 2⁷ = 1628073089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1628073211) 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, 814036608 + 814036609.

It is an arithmetic number, because the mean of its divisors is an integer number (814036609).

Almost surely, 2^1628073217 is an apocalyptic number.

It is an amenable number.

1628073217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628073217 is an equidigital number, since it uses as much as digits as its factorization.

1628073217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1628073217 is about 40349.3893014504. The cubic root of 1628073217 is about 1176.4080219237.

The spelling of 1628073217 in words is "one billion, six hundred twenty-eight million, seventy-three thousand, two hundred seventeen".