19284989 has 2 divisors, whose sum is σ = 19284990. Its totient is φ = 19284988.

The previous prime is 19284977. The next prime is 19285033. The reversal of 19284989 is 98948291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18344089 + 940900 = 4283^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 19284989 - 2²⁴ = 2507773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19284589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9642494 + 9642495.

It is an arithmetic number, because the mean of its divisors is an integer number (9642495).

Almost surely, 2^19284989 is an apocalyptic number.

It is an amenable number.

19284989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19284989 is an equidigital number, since it uses as much as digits as its factorization.

19284989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 19284989 is about 4391.4677500808. The cubic root of 19284989 is about 268.1676987474.

The spelling of 19284989 in words is "nineteen million, two hundred eighty-four thousand, nine hundred eighty-nine".