1944196549 has 2 divisors, whose sum is σ = 1944196550. Its totient is φ = 1944196548.

The previous prime is 1944196493. The next prime is 1944196577. The reversal of 1944196549 is 9456914491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1858041025 + 86155524 = 43105^2 + 9282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944196549 - 2¹⁷ = 1944065477 is a prime.

It is a super-2 number, since 2×1944196549² = 7559800442287018802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1944196496 and 1944196505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944196249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972098274 + 972098275.

It is an arithmetic number, because the mean of its divisors is an integer number (972098275).

Almost surely, 2^1944196549 is an apocalyptic number.

It is an amenable number.

1944196549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944196549 is an equidigital number, since it uses as much as digits as its factorization.

1944196549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The square root of 1944196549 is about 44093.0442246847. The cubic root of 1944196549 is about 1248.0923539770.

The spelling of 1944196549 in words is "one billion, nine hundred forty-four million, one hundred ninety-six thousand, five hundred forty-nine".