19040101 has 2 divisors, whose sum is σ = 19040102. Its totient is φ = 19040100.

The previous prime is 19040093. The next prime is 19040137. The reversal of 19040101 is 10104091.

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., 18931201 + 108900 = 4351^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 19040101 - 2³ = 19040093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19040191) 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, 9520050 + 9520051.

It is an arithmetic number, because the mean of its divisors is an integer number (9520051).

Almost surely, 2^19040101 is an apocalyptic number.

It is an amenable number.

19040101 is a deficient number, since it is larger than the sum of its proper divisors (1).

19040101 is an equidigital number, since it uses as much as digits as its factorization.

19040101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 19040101 is about 4363.4964191575. The cubic root of 19040101 is about 267.0277620326.

Adding to 19040101 its reverse (10104091), we get a palindrome (29144192).

The spelling of 19040101 in words is "nineteen million, forty thousand, one hundred one".