70243691321 has 2 divisors, whose sum is σ = 70243691322. Its totient is φ = 70243691320.

The previous prime is 70243691299. The next prime is 70243691363. The reversal of 70243691321 is 12319634207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70045444921 + 198246400 = 264661^2 + 14080^2 .

It is a cyclic number.

It is not a de Polignac number, because 70243691321 - 2²² = 70239497017 is a prime.

It is not a weakly prime, because it can be changed into another prime (70243621321) 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, 35121845660 + 35121845661.

It is an arithmetic number, because the mean of its divisors is an integer number (35121845661).

Almost surely, 2^70243691321 is an apocalyptic number.

It is an amenable number.

70243691321 is a deficient number, since it is larger than the sum of its proper divisors (1).

70243691321 is an equidigital number, since it uses as much as digits as its factorization.

70243691321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 70243691321 in words is "seventy billion, two hundred forty-three million, six hundred ninety-one thousand, three hundred twenty-one".