1011843949 has 2 divisors, whose sum is σ = 1011843950. Its totient is φ = 1011843948.

The previous prime is 1011843919. The next prime is 1011843971. The reversal of 1011843949 is 9493481101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621504900 + 390339049 = 24930^2 + 19757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011843949 - 2²¹ = 1009746797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011843919) 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, 505921974 + 505921975.

It is an arithmetic number, because the mean of its divisors is an integer number (505921975).

Almost surely, 2^1011843949 is an apocalyptic number.

It is an amenable number.

1011843949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011843949 is an equidigital number, since it uses as much as digits as its factorization.

1011843949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1011843949 is about 31809.4946360360. The cubic root of 1011843949 is about 1003.9324981866.

The spelling of 1011843949 in words is "one billion, eleven million, eight hundred forty-three thousand, nine hundred forty-nine".