19975959 has 6 divisors (see below), whose sum is σ = 28854176. Its totient is φ = 13317300.

The previous prime is 19975933. The next prime is 19975981. The reversal of 19975959 is 95957991.

It is not a de Polignac number, because 19975959 - 2¹² = 19971863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19975999) 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 5 ways as a sum of consecutive naturals, for example, 1109767 + ... + 1109784.

Almost surely, 2^19975959 is an apocalyptic number.

19975959 is a deficient number, since it is larger than the sum of its proper divisors (8878217).

19975959 is a wasteful number, since it uses less digits than its factorization.

19975959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219557 (or 2219554 counting only the distinct ones).

The product of its digits is 1148175, while the sum is 54.

The square root of 19975959 is about 4469.4472812642. The cubic root of 19975959 is about 271.3329558613.

The spelling of 19975959 in words is "nineteen million, nine hundred seventy-five thousand, nine hundred fifty-nine".