70138263917 has 2 divisors, whose sum is σ = 70138263918. Its totient is φ = 70138263916.

The previous prime is 70138263869. The next prime is 70138263959. The reversal of 70138263917 is 71936283107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55171432996 + 14966830921 = 234886^2 + 122339^2 .

It is a cyclic number.

It is not a de Polignac number, because 70138263917 - 2²⁰ = 70137215341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70138263967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35069131958 + 35069131959.

It is an arithmetic number, because the mean of its divisors is an integer number (35069131959).

Almost surely, 2^70138263917 is an apocalyptic number.

It is an amenable number.

70138263917 is a deficient number, since it is larger than the sum of its proper divisors (1).

70138263917 is an equidigital number, since it uses as much as digits as its factorization.

70138263917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 70138263917 in words is "seventy billion, one hundred thirty-eight million, two hundred sixty-three thousand, nine hundred seventeen".