6838690121971 has 2 divisors, whose sum is σ = 6838690121972. Its totient is φ = 6838690121970.

The previous prime is 6838690121957. The next prime is 6838690121981. The reversal of 6838690121971 is 1791210968386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6838690121971 - 2³¹ = 6836542638323 is a prime.

It is not a weakly prime, because it can be changed into another prime (6838690121941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3419345060985 + 3419345060986.

It is an arithmetic number, because the mean of its divisors is an integer number (3419345060986).

Almost surely, 2^{6838690121971} is an apocalyptic number.

6838690121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6838690121971 is an equidigital number, since it uses as much as digits as its factorization.

6838690121971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 6838690121971 in words is "six trillion, eight hundred thirty-eight billion, six hundred ninety million, one hundred twenty-one thousand, nine hundred seventy-one".