1010001689 has 2 divisors, whose sum is σ = 1010001690. Its totient is φ = 1010001688.

The previous prime is 1010001683. The next prime is 1010001701. The reversal of 1010001689 is 9861000101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825585289 + 184416400 = 28733^2 + 13580^2 .

It is an emirp because it is prime and its reverse (9861000101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010001689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1010001683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505000844 + 505000845.

It is an arithmetic number, because the mean of its divisors is an integer number (505000845).

Almost surely, 2^1010001689 is an apocalyptic number.

It is an amenable number.

1010001689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010001689 is an equidigital number, since it uses as much as digits as its factorization.

1010001689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1010001689 is about 31780.5237370311. The cubic root of 1010001689 is about 1003.3228428194.

The spelling of 1010001689 in words is "one billion, ten million, one thousand, six hundred eighty-nine".