1912644133 has 2 divisors, whose sum is σ = 1912644134. Its totient is φ = 1912644132.

The previous prime is 1912644127. The next prime is 1912644161. The reversal of 1912644133 is 3314462191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1552517604 + 360126529 = 39402^2 + 18977^2 .

It is an emirp because it is prime and its reverse (3314462191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1912644133 - 2¹³ = 1912635941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912644103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956322066 + 956322067.

It is an arithmetic number, because the mean of its divisors is an integer number (956322067).

Almost surely, 2^1912644133 is an apocalyptic number.

It is an amenable number.

1912644133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912644133 is an equidigital number, since it uses as much as digits as its factorization.

1912644133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 1912644133 is about 43733.7870873310. The cubic root of 1912644133 is about 1241.3037218035.

The spelling of 1912644133 in words is "one billion, nine hundred twelve million, six hundred forty-four thousand, one hundred thirty-three".