19970017 has 4 divisors (see below), whose sum is σ = 20434480. Its totient is φ = 19505556.

The previous prime is 19970011. The next prime is 19970039. The reversal of 19970017 is 71007991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71007991 = 2699 ⋅26309.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19970017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19970011) 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 in 3 ways as a sum of consecutive naturals, for example, 232167 + ... + 232252.

It is an arithmetic number, because the mean of its divisors is an integer number (5108620).

Almost surely, 2^19970017 is an apocalyptic number.

It is an amenable number.

19970017 is a deficient number, since it is larger than the sum of its proper divisors (464463).

19970017 is an equidigital number, since it uses as much as digits as its factorization.

19970017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464462.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 19970017 is about 4468.7824963853. The cubic root of 19970017 is about 271.3060498471.

The spelling of 19970017 in words is "nineteen million, nine hundred seventy thousand, seventeen".