1013783921 has 2 divisors, whose sum is σ = 1013783922. Its totient is φ = 1013783920.

The previous prime is 1013783887. The next prime is 1013783929. The reversal of 1013783921 is 1293873101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 979690000 + 34093921 = 31300^2 + 5839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013783921 - 2¹⁰ = 1013782897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1013783929) 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, 506891960 + 506891961.

It is an arithmetic number, because the mean of its divisors is an integer number (506891961).

Almost surely, 2^1013783921 is an apocalyptic number.

It is an amenable number.

1013783921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013783921 is an equidigital number, since it uses as much as digits as its factorization.

1013783921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1013783921 is about 31839.9736337831. The cubic root of 1013783921 is about 1004.5736898031.

The spelling of 1013783921 in words is "one billion, thirteen million, seven hundred eighty-three thousand, nine hundred twenty-one".