190819867417 has 2 divisors, whose sum is σ = 190819867418. Its totient is φ = 190819867416.

The previous prime is 190819867373. The next prime is 190819867477. The reversal of 190819867417 is 714768918091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123861059721 + 66958807696 = 351939^2 + 258764^2 .

It is an emirp because it is prime and its reverse (714768918091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190819867417 is a prime.

It is not a weakly prime, because it can be changed into another prime (190819867477) 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, 95409933708 + 95409933709.

It is an arithmetic number, because the mean of its divisors is an integer number (95409933709).

Almost surely, 2^190819867417 is an apocalyptic number.

It is an amenable number.

190819867417 is a deficient number, since it is larger than the sum of its proper divisors (1).

190819867417 is an equidigital number, since it uses as much as digits as its factorization.

190819867417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 190819867417 in words is "one hundred ninety billion, eight hundred nineteen million, eight hundred sixty-seven thousand, four hundred seventeen".