8007208021 has 2 divisors, whose sum is σ = 8007208022. Its totient is φ = 8007208020.

The previous prime is 8007207979. The next prime is 8007208043. The reversal of 8007208021 is 1208027008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7626528900 + 380679121 = 87330^2 + 19511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8007208021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8007205021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4003604010 + 4003604011.

It is an arithmetic number, because the mean of its divisors is an integer number (4003604011).

Almost surely, 2^8007208021 is an apocalyptic number.

It is an amenable number.

8007208021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8007208021 is an equidigital number, since it uses as much as digits as its factorization.

8007208021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8007208021 is about 89483.0040901623. The cubic root of 8007208021 is about 2000.6004881056.

The spelling of 8007208021 in words is "eight billion, seven million, two hundred eight thousand, twenty-one".