19423087 has 2 divisors, whose sum is σ = 19423088. Its totient is φ = 19423086.

The previous prime is 19423067. The next prime is 19423121. The reversal of 19423087 is 78032491.

It is an a-pointer prime, because the next prime (19423121) can be obtained adding 19423087 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19423087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19423067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9711543 + 9711544.

It is an arithmetic number, because the mean of its divisors is an integer number (9711544).

Almost surely, 2^19423087 is an apocalyptic number.

19423087 is a deficient number, since it is larger than the sum of its proper divisors (1).

19423087 is an equidigital number, since it uses as much as digits as its factorization.

19423087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 19423087 is about 4407.1631465150. The cubic root of 19423087 is about 268.8062848041.

The spelling of 19423087 in words is "nineteen million, four hundred twenty-three thousand, eighty-seven".