70683938021 has 2 divisors, whose sum is σ = 70683938022. Its totient is φ = 70683938020.

The previous prime is 70683938009. The next prime is 70683938027. The reversal of 70683938021 is 12083938607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38058547396 + 32625390625 = 195086^2 + 180625^2 .

It is a cyclic number.

It is not a de Polignac number, because 70683938021 - 2¹⁰ = 70683936997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70683938027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35341969010 + 35341969011.

It is an arithmetic number, because the mean of its divisors is an integer number (35341969011).

Almost surely, 2^70683938021 is an apocalyptic number.

It is an amenable number.

70683938021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70683938021 is an equidigital number, since it uses as much as digits as its factorization.

70683938021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 70683938021 in words is "seventy billion, six hundred eighty-three million, nine hundred thirty-eight thousand, twenty-one".