9931379151817 has 2 divisors, whose sum is σ = 9931379151818. Its totient is φ = 9931379151816.

The previous prime is 9931379151763. The next prime is 9931379151871. The reversal of 9931379151817 is 7181519731399.

Together with next prime (9931379151871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (9931379151763) and next prime (9931379151871).

It can be written as a sum of positive squares in only one way, i.e., 9386600827536 + 544778324281 = 3063756^2 + 738091^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931379151817 - 2⁷ = 9931379151689 is a prime.

It is not a weakly prime, because it can be changed into another prime (9931379101817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965689575908 + 4965689575909.

It is an arithmetic number, because the mean of its divisors is an integer number (4965689575909).

Almost surely, 2^{9931379151817} is an apocalyptic number.

It is an amenable number.

9931379151817 is a deficient number, since it is larger than the sum of its proper divisors (1).

9931379151817 is an equidigital number, since it uses as much as digits as its factorization.

9931379151817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12859560, while the sum is 64.

The spelling of 9931379151817 in words is "nine trillion, nine hundred thirty-one billion, three hundred seventy-nine million, one hundred fifty-one thousand, eight hundred seventeen".