19973119 has 2 divisors, whose sum is σ = 19973120. Its totient is φ = 19973118.

The previous prime is 19973117. The next prime is 19973137. The reversal of 19973119 is 91137991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19973119 - 2¹ = 19973117 is a prime.

It is a super-2 number, since 2×19973119² = 797850965176322, which contains 22 as substring.

Together with 19973117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19973111) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986559 + 9986560.

It is an arithmetic number, because the mean of its divisors is an integer number (9986560).

Almost surely, 2^19973119 is an apocalyptic number.

19973119 is a deficient number, since it is larger than the sum of its proper divisors (1).

19973119 is an equidigital number, since it uses as much as digits as its factorization.

19973119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309, while the sum is 40.

The square root of 19973119 is about 4469.1295573076. The cubic root of 19973119 is about 271.3200967020.

The spelling of 19973119 in words is "nineteen million, nine hundred seventy-three thousand, one hundred nineteen".