19010009 has 2 divisors, whose sum is σ = 19010010. Its totient is φ = 19010008.

The previous prime is 19009981. The next prime is 19010021. The reversal of 19010009 is 90001091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 7038409 = 3460^2 + 2653^2 .

It is a cyclic number.

It is not a de Polignac number, because 19010009 - 2¹⁶ = 18944473 is a prime.

It is a super-2 number, since 2×19010009² = 722760884360162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19010059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9505004 + 9505005.

It is an arithmetic number, because the mean of its divisors is an integer number (9505005).

Almost surely, 2^19010009 is an apocalyptic number.

It is an amenable number.

19010009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19010009 is an equidigital number, since it uses as much as digits as its factorization.

19010009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 19010009 is about 4360.0469034174. The cubic root of 19010009 is about 266.8870128435.

The spelling of 19010009 in words is "nineteen million, ten thousand, nine".