8006042621 has 2 divisors, whose sum is σ = 8006042622. Its totient is φ = 8006042620.

The previous prime is 8006042581. The next prime is 8006042623. The reversal of 8006042621 is 1262406008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5537443396 + 2468599225 = 74414^2 + 49685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8006042621 is a prime.

Together with 8006042623, 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 (8006042623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4003021310 + 4003021311.

It is an arithmetic number, because the mean of its divisors is an integer number (4003021311).

Almost surely, 2^8006042621 is an apocalyptic number.

It is an amenable number.

8006042621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8006042621 is an equidigital number, since it uses as much as digits as its factorization.

8006042621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8006042621 is about 89476.4920020896. The cubic root of 8006042621 is about 2000.5034250210.

Adding to 8006042621 its reverse (1262406008), we get a palindrome (9268448629).

The spelling of 8006042621 in words is "eight billion, six million, forty-two thousand, six hundred twenty-one".