8404013 has 2 divisors, whose sum is σ = 8404014. Its totient is φ = 8404012.

The previous prime is 8403977. The next prime is 8404021. The reversal of 8404013 is 3104048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7606564 + 797449 = 2758^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404013 - 2¹⁸ = 8141869 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202006 + 4202007.

It is an arithmetic number, because the mean of its divisors is an integer number (4202007).

Almost surely, 2^8404013 is an apocalyptic number.

It is an amenable number.

8404013 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404013 is an equidigital number, since it uses as much as digits as its factorization.

8404013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 8404013 is about 2898.9675748445. The cubic root of 8404013 is about 203.3116376266.

The spelling of 8404013 in words is "eight million, four hundred four thousand, thirteen".