19122923 has 2 divisors, whose sum is σ = 19122924. Its totient is φ = 19122922.

The previous prime is 19122907. The next prime is 19122947. The reversal of 19122923 is 32922191.

It is a weak prime.

It is an emirp because it is prime and its reverse (32922191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19122923 - 2⁴ = 19122907 is a prime.

It is not a weakly prime, because it can be changed into another prime (19122973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9561461 + 9561462.

It is an arithmetic number, because the mean of its divisors is an integer number (9561462).

Almost surely, 2^19122923 is an apocalyptic number.

19122923 is a deficient number, since it is larger than the sum of its proper divisors (1).

19122923 is an equidigital number, since it uses as much as digits as its factorization.

19122923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 19122923 is about 4372.9764463121. The cubic root of 19122923 is about 267.4143808439.

The spelling of 19122923 in words is "nineteen million, one hundred twenty-two thousand, nine hundred twenty-three".