6720187973 has 2 divisors, whose sum is σ = 6720187974. Its totient is φ = 6720187972.

The previous prime is 6720187931. The next prime is 6720187987. The reversal of 6720187973 is 3797810276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4752999364 + 1967188609 = 68942^2 + 44353^2 .

It is a cyclic number.

It is not a de Polignac number, because 6720187973 - 2¹⁴ = 6720171589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6720187073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360093986 + 3360093987.

It is an arithmetic number, because the mean of its divisors is an integer number (3360093987).

Almost surely, 2^6720187973 is an apocalyptic number.

It is an amenable number.

6720187973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720187973 is an equidigital number, since it uses as much as digits as its factorization.

6720187973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 6720187973 is about 81976.7526375618. The cubic root of 6720187973 is about 1887.0951871826.

The spelling of 6720187973 in words is "six billion, seven hundred twenty million, one hundred eighty-seven thousand, nine hundred seventy-three".