19412389 has 2 divisors, whose sum is σ = 19412390. Its totient is φ = 19412388.

The previous prime is 19412387. The next prime is 19412399. The reversal of 19412389 is 98321491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 3276100 = 4017^2 + 1810^2 .

It is a cyclic number.

It is not a de Polignac number, because 19412389 - 2¹ = 19412387 is a prime.

Together with 19412387, 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 (19412381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9706194 + 9706195.

It is an arithmetic number, because the mean of its divisors is an integer number (9706195).

Almost surely, 2^19412389 is an apocalyptic number.

It is an amenable number.

19412389 is a deficient number, since it is larger than the sum of its proper divisors (1).

19412389 is an equidigital number, since it uses as much as digits as its factorization.

19412389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 19412389 is about 4405.9492734256. The cubic root of 19412389 is about 268.7569239968.

The spelling of 19412389 in words is "nineteen million, four hundred twelve thousand, three hundred eighty-nine".