3917915139091 has 2 divisors, whose sum is σ = 3917915139092. Its totient is φ = 3917915139090.

The previous prime is 3917915138999. The next prime is 3917915139133. The reversal of 3917915139091 is 1909315197193.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3917915139091 is a prime.

It is not a weakly prime, because it can be changed into another prime (3917915139491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1958957569545 + 1958957569546.

It is an arithmetic number, because the mean of its divisors is an integer number (1958957569546).

Almost surely, 2^{3917915139091} is an apocalyptic number.

3917915139091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3917915139091 is an equidigital number, since it uses as much as digits as its factorization.

3917915139091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2066715, while the sum is 58.

The spelling of 3917915139091 in words is "three trillion, nine hundred seventeen billion, nine hundred fifteen million, one hundred thirty-nine thousand, ninety-one".