6956138993 has 2 divisors, whose sum is σ = 6956138994. Its totient is φ = 6956138992.

The previous prime is 6956138977. The next prime is 6956139031. The reversal of 6956138993 is 3998316596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5427563584 + 1528575409 = 73672^2 + 39097^2 .

It is a cyclic number.

It is not a de Polignac number, because 6956138993 - 2⁴ = 6956138977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6956138933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3478069496 + 3478069497.

It is an arithmetic number, because the mean of its divisors is an integer number (3478069497).

Almost surely, 2^6956138993 is an apocalyptic number.

It is an amenable number.

6956138993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6956138993 is an equidigital number, since it uses as much as digits as its factorization.

6956138993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 59.

The square root of 6956138993 is about 83403.4711088214. The cubic root of 6956138993 is about 1908.9274236202.

The spelling of 6956138993 in words is "six billion, nine hundred fifty-six million, one hundred thirty-eight thousand, nine hundred ninety-three".