7023907021 has 2 divisors, whose sum is σ = 7023907022. Its totient is φ = 7023907020.

The previous prime is 7023907019. The next prime is 7023907069. The reversal of 7023907021 is 1207093207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4527405796 + 2496501225 = 67286^2 + 49965^2 .

It is an emirp because it is prime and its reverse (1207093207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7023907021 - 2¹ = 7023907019 is a prime.

Together with 7023907019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7023907001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3511953510 + 3511953511.

It is an arithmetic number, because the mean of its divisors is an integer number (3511953511).

Almost surely, 2^7023907021 is an apocalyptic number.

It is an amenable number.

7023907021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7023907021 is an equidigital number, since it uses as much as digits as its factorization.

7023907021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 7023907021 is about 83808.7526514982. The cubic root of 7023907021 is about 1915.1064456916.

The spelling of 7023907021 in words is "seven billion, twenty-three million, nine hundred seven thousand, twenty-one".