19104391 has 2 divisors, whose sum is σ = 19104392. Its totient is φ = 19104390.

The previous prime is 19104389. The next prime is 19104403. The reversal of 19104391 is 19340191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19104391 - 2¹ = 19104389 is a prime.

Together with 19104389, 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 (19104331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9552195 + 9552196.

It is an arithmetic number, because the mean of its divisors is an integer number (9552196).

Almost surely, 2^19104391 is an apocalyptic number.

19104391 is a deficient number, since it is larger than the sum of its proper divisors (1).

19104391 is an equidigital number, since it uses as much as digits as its factorization.

19104391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 19104391 is about 4370.8570097865. The cubic root of 19104391 is about 267.3279692803.

The spelling of 19104391 in words is "nineteen million, one hundred four thousand, three hundred ninety-one".