1004213909 has 2 divisors, whose sum is σ = 1004213910. Its totient is φ = 1004213908.

The previous prime is 1004213893. The next prime is 1004213911. The reversal of 1004213909 is 9093124001.

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., 933485809 + 70728100 = 30553^2 + 8410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004213909 - 2⁴ = 1004213893 is a prime.

Together with 1004213911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004213009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502106954 + 502106955.

It is an arithmetic number, because the mean of its divisors is an integer number (502106955).

Almost surely, 2^1004213909 is an apocalyptic number.

It is an amenable number.

1004213909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004213909 is an equidigital number, since it uses as much as digits as its factorization.

1004213909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1004213909 is about 31689.3343098273. The cubic root of 1004213909 is about 1001.4026679361.

The spelling of 1004213909 in words is "one billion, four million, two hundred thirteen thousand, nine hundred nine".