1944281413 has 2 divisors, whose sum is σ = 1944281414. Its totient is φ = 1944281412.

The previous prime is 1944281401. The next prime is 1944281429. The reversal of 1944281413 is 3141824491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1936176004 + 8105409 = 44002^2 + 2847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1944281413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944288413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972140706 + 972140707.

It is an arithmetic number, because the mean of its divisors is an integer number (972140707).

Almost surely, 2^1944281413 is an apocalyptic number.

It is an amenable number.

1944281413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944281413 is an equidigital number, since it uses as much as digits as its factorization.

1944281413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 1944281413 is about 44094.0065428398. The cubic root of 1944281413 is about 1248.1105134181.

The spelling of 1944281413 in words is "one billion, nine hundred forty-four million, two hundred eighty-one thousand, four hundred thirteen".