1919100133 has 2 divisors, whose sum is σ = 1919100134. Its totient is φ = 1919100132.

The previous prime is 1919100121. The next prime is 1919100173. The reversal of 1919100133 is 3310019191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1318997124 + 600103009 = 36318^2 + 24497^2 .

It is an emirp because it is prime and its reverse (3310019191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1919100133 - 2⁵ = 1919100101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919100173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959550066 + 959550067.

It is an arithmetic number, because the mean of its divisors is an integer number (959550067).

Almost surely, 2^1919100133 is an apocalyptic number.

It is an amenable number.

1919100133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919100133 is an equidigital number, since it uses as much as digits as its factorization.

1919100133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 1919100133 is about 43807.5351166897. The cubic root of 1919100133 is about 1242.6987987057.

The spelling of 1919100133 in words is "one billion, nine hundred nineteen million, one hundred thousand, one hundred thirty-three".