1000340813 has 2 divisors, whose sum is σ = 1000340814. Its totient is φ = 1000340812.

The previous prime is 1000340779. The next prime is 1000340821. The reversal of 1000340813 is 3180430001.

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., 947531524 + 52809289 = 30782^2 + 7267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000340813 - 2²² = 996146509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000340893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500170406 + 500170407.

It is an arithmetic number, because the mean of its divisors is an integer number (500170407).

Almost surely, 2^1000340813 is an apocalyptic number.

It is an amenable number.

1000340813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000340813 is an equidigital number, since it uses as much as digits as its factorization.

1000340813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1000340813 is about 31628.1648693060. The cubic root of 1000340813 is about 1000.1135914298.

Adding to 1000340813 its reverse (3180430001), we get a palindrome (4180770814).

The spelling of 1000340813 in words is "one billion, three hundred forty thousand, eight hundred thirteen".