19950517 has 2 divisors, whose sum is σ = 19950518. Its totient is φ = 19950516.

The previous prime is 19950481. The next prime is 19950527. The reversal of 19950517 is 71505991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12773476 + 7177041 = 3574^2 + 2679^2 .

It is an emirp because it is prime and its reverse (71505991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19950517 - 2¹⁵ = 19917749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19950527) 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, 9975258 + 9975259.

It is an arithmetic number, because the mean of its divisors is an integer number (9975259).

Almost surely, 2^19950517 is an apocalyptic number.

It is an amenable number.

19950517 is a deficient number, since it is larger than the sum of its proper divisors (1).

19950517 is an equidigital number, since it uses as much as digits as its factorization.

19950517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 19950517 is about 4466.6001611964. The cubic root of 19950517 is about 271.2177142373.

The spelling of 19950517 in words is "nineteen million, nine hundred fifty thousand, five hundred seventeen".