70947143377921 has 2 divisors, whose sum is σ = 70947143377922. Its totient is φ = 70947143377920.

The previous prime is 70947143377919. The next prime is 70947143377927. The reversal of 70947143377921 is 12977334174907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52653730051521 + 18293413326400 = 7256289^2 + 4277080^2 .

It is a cyclic number.

It is not a de Polignac number, because 70947143377921 - 2¹ = 70947143377919 is a prime.

Together with 70947143377919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70947143377927) 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, 35473571688960 + 35473571688961.

It is an arithmetic number, because the mean of its divisors is an integer number (35473571688961).

Almost surely, 2^{70947143377921} is an apocalyptic number.

It is an amenable number.

70947143377921 is a deficient number, since it is larger than the sum of its proper divisors (1).

70947143377921 is an equidigital number, since it uses as much as digits as its factorization.

70947143377921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56010528, while the sum is 64.

The spelling of 70947143377921 in words is "seventy trillion, nine hundred forty-seven billion, one hundred forty-three million, three hundred seventy-seven thousand, nine hundred twenty-one".