6391958101 has 2 divisors, whose sum is σ = 6391958102. Its totient is φ = 6391958100.

The previous prime is 6391958081. The next prime is 6391958117. The reversal of 6391958101 is 1018591936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3918885201 + 2473072900 = 62601^2 + 49730^2 .

It is a cyclic number.

It is not a de Polignac number, because 6391958101 - 2⁷ = 6391957973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6391958161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195979050 + 3195979051.

It is an arithmetic number, because the mean of its divisors is an integer number (3195979051).

Almost surely, 2^6391958101 is an apocalyptic number.

It is an amenable number.

6391958101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6391958101 is an equidigital number, since it uses as much as digits as its factorization.

6391958101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 6391958101 is about 79949.7223322258. The cubic root of 6391958101 is about 1855.8575577373.

The spelling of 6391958101 in words is "six billion, three hundred ninety-one million, nine hundred fifty-eight thousand, one hundred one".