6920021039 has 2 divisors, whose sum is σ = 6920021040. Its totient is φ = 6920021038.

The previous prime is 6920020997. The next prime is 6920021047. The reversal of 6920021039 is 9301200296.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6920021039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6920020996 and 6920021014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6920026039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460010519 + 3460010520.

It is an arithmetic number, because the mean of its divisors is an integer number (3460010520).

Almost surely, 2^6920021039 is an apocalyptic number.

6920021039 is a deficient number, since it is larger than the sum of its proper divisors (1).

6920021039 is an equidigital number, since it uses as much as digits as its factorization.

6920021039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6920021039 is about 83186.6638290057. The cubic root of 6920021039 is about 1905.6178181332.

The spelling of 6920021039 in words is "six billion, nine hundred twenty million, twenty-one thousand, thirty-nine".