100821683 has 2 divisors, whose sum is σ = 100821684. Its totient is φ = 100821682.

The previous prime is 100821671. The next prime is 100821691. The reversal of 100821683 is 386128001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100821683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (100821613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50410841 + 50410842.

It is an arithmetic number, because the mean of its divisors is an integer number (50410842).

Almost surely, 2^100821683 is an apocalyptic number.

100821683 is a deficient number, since it is larger than the sum of its proper divisors (1).

100821683 is an equidigital number, since it uses as much as digits as its factorization.

100821683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 100821683 is about 10041.0000995917. Note that the first 4 decimals coincide. The cubic root of 100821683 is about 465.4267220170.

Adding to 100821683 its reverse (386128001), we get a palindrome (486949684).

The spelling of 100821683 in words is "one hundred million, eight hundred twenty-one thousand, six hundred eighty-three".