1020500669 has 2 divisors, whose sum is σ = 1020500670. Its totient is φ = 1020500668.

The previous prime is 1020500647. The next prime is 1020500711. The reversal of 1020500669 is 9660050201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019205625 + 1295044 = 31925^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020500669 - 2²⁴ = 1003723453 is a prime.

It is a super-2 number, since 2×1020500669² = 2082843230858895122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020500629) 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, 510250334 + 510250335.

It is an arithmetic number, because the mean of its divisors is an integer number (510250335).

Almost surely, 2^1020500669 is an apocalyptic number.

It is an amenable number.

1020500669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020500669 is an equidigital number, since it uses as much as digits as its factorization.

1020500669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1020500669 is about 31945.2761609600. The cubic root of 1020500669 is about 1006.7873835298.

The spelling of 1020500669 in words is "one billion, twenty million, five hundred thousand, six hundred sixty-nine".