1020217069 has 2 divisors, whose sum is σ = 1020217070. Its totient is φ = 1020217068.

The previous prime is 1020217067. The next prime is 1020217091. The reversal of 1020217069 is 9607120201.

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., 555167844 + 465049225 = 23562^2 + 21565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020217069 - 2¹ = 1020217067 is a prime.

It is a super-2 number, since 2×1020217069² = 2081685735757901522, which contains 22 as substring.

Together with 1020217067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020217067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510108534 + 510108535.

It is an arithmetic number, because the mean of its divisors is an integer number (510108535).

Almost surely, 2^1020217069 is an apocalyptic number.

It is an amenable number.

1020217069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020217069 is an equidigital number, since it uses as much as digits as its factorization.

1020217069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1020217069 is about 31940.8370115750. The cubic root of 1020217069 is about 1006.6941118759.

It can be divided in two parts, 1020 and 217069, that added together give a square (218089 = 467²).

The spelling of 1020217069 in words is "one billion, twenty million, two hundred seventeen thousand, sixty-nine".