1949404141 has 2 divisors, whose sum is σ = 1949404142. Its totient is φ = 1949404140.

The previous prime is 1949404133. The next prime is 1949404147. The reversal of 1949404141 is 1414049491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193978916 + 755425225 = 34554^2 + 27485^2 .

It is an emirp because it is prime and its reverse (1414049491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1949404141 - 2³ = 1949404133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1949404141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949404147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974702070 + 974702071.

It is an arithmetic number, because the mean of its divisors is an integer number (974702071).

Almost surely, 2^1949404141 is an apocalyptic number.

It is an amenable number.

1949404141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949404141 is an equidigital number, since it uses as much as digits as its factorization.

1949404141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1949404141 is about 44152.0570415468. The cubic root of 1949404141 is about 1249.2057121390.

The spelling of 1949404141 in words is "one billion, nine hundred forty-nine million, four hundred four thousand, one hundred forty-one".