101819117 has 2 divisors, whose sum is σ = 101819118. Its totient is φ = 101819116.

The previous prime is 101819111. The next prime is 101819147. The reversal of 101819117 is 711918101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91795561 + 10023556 = 9581^2 + 3166^2 .

It is a cyclic number.

It is not a de Polignac number, because 101819117 - 2¹⁴ = 101802733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101819117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101819111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50909558 + 50909559.

It is an arithmetic number, because the mean of its divisors is an integer number (50909559).

Almost surely, 2^101819117 is an apocalyptic number.

It is an amenable number.

101819117 is a deficient number, since it is larger than the sum of its proper divisors (1).

101819117 is an equidigital number, since it uses as much as digits as its factorization.

101819117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 29.

The square root of 101819117 is about 10090.5459218022. The cubic root of 101819117 is about 466.9565182888.

The spelling of 101819117 in words is "one hundred one million, eight hundred nineteen thousand, one hundred seventeen".