1022720417 has 2 divisors, whose sum is σ = 1022720418. Its totient is φ = 1022720416.

The previous prime is 1022720393. The next prime is 1022720431. The reversal of 1022720417 is 7140272201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589081441 + 433638976 = 24271^2 + 20824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022720417 - 2¹⁶ = 1022654881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022720477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511360208 + 511360209.

It is an arithmetic number, because the mean of its divisors is an integer number (511360209).

Almost surely, 2^1022720417 is an apocalyptic number.

It is an amenable number.

1022720417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022720417 is an equidigital number, since it uses as much as digits as its factorization.

1022720417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 1022720417 is about 31980.0002657911. Note that the first 3 decimals coincide. The cubic root of 1022720417 is about 1007.5168280556.

Adding to 1022720417 its reverse (7140272201), we get a palindrome (8162992618).

The spelling of 1022720417 in words is "one billion, twenty-two million, seven hundred twenty thousand, four hundred seventeen".