1949666941 has 2 divisors, whose sum is σ = 1949666942. Its totient is φ = 1949666940.

The previous prime is 1949666899. The next prime is 1949666987. The reversal of 1949666941 is 1496669491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1949664025 + 2916 = 44155^2 + 54^2 .

It is a cyclic number.

It is not a de Polignac number, because 1949666941 - 2⁷ = 1949666813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949666041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974833470 + 974833471.

It is an arithmetic number, because the mean of its divisors is an integer number (974833471).

Almost surely, 2^1949666941 is an apocalyptic number.

It is an amenable number.

1949666941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949666941 is an equidigital number, since it uses as much as digits as its factorization.

1949666941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The square root of 1949666941 is about 44155.0330200307. The cubic root of 1949666941 is about 1249.2618449341.

The spelling of 1949666941 in words is "one billion, nine hundred forty-nine million, six hundred sixty-six thousand, nine hundred forty-one".