101669819 has 2 divisors, whose sum is σ = 101669820. Its totient is φ = 101669818.

The previous prime is 101669749. The next prime is 101669831. The reversal of 101669819 is 918966101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101669819 is a prime.

It is a super-2 number, since 2×101669819² = 20673504190985522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (101669899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50834909 + 50834910.

It is an arithmetic number, because the mean of its divisors is an integer number (50834910).

Almost surely, 2^101669819 is an apocalyptic number.

101669819 is a deficient number, since it is larger than the sum of its proper divisors (1).

101669819 is an equidigital number, since it uses as much as digits as its factorization.

101669819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 101669819 is about 10083.1452930125. The cubic root of 101669819 is about 466.7281729022.

The spelling of 101669819 in words is "one hundred one million, six hundred sixty-nine thousand, eight hundred nineteen".