19125919 has 2 divisors, whose sum is σ = 19125920. Its totient is φ = 19125918.

The previous prime is 19125917. The next prime is 19125941. The reversal of 19125919 is 91952191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19125919 - 2¹ = 19125917 is a prime.

It is a super-2 number, since 2×19125919² = 731601555189122, which contains 22 as substring.

Together with 19125917, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19125917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9562959 + 9562960.

It is an arithmetic number, because the mean of its divisors is an integer number (9562960).

Almost surely, 2^19125919 is an apocalyptic number.

19125919 is a deficient number, since it is larger than the sum of its proper divisors (1).

19125919 is an equidigital number, since it uses as much as digits as its factorization.

19125919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 37.

The square root of 19125919 is about 4373.3189913383. The cubic root of 19125919 is about 267.4283454393.

The spelling of 19125919 in words is "nineteen million, one hundred twenty-five thousand, nine hundred nineteen".