979785353213 has 2 divisors, whose sum is σ = 979785353214. Its totient is φ = 979785353212.

The previous prime is 979785353179. The next prime is 979785353237. The reversal of 979785353213 is 312353587979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537988509529 + 441796843684 = 733477^2 + 664678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979785353213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979785353293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489892676606 + 489892676607.

It is an arithmetic number, because the mean of its divisors is an integer number (489892676607).

Almost surely, 2^979785353213 is an apocalyptic number.

It is an amenable number.

979785353213 is a deficient number, since it is larger than the sum of its proper divisors (1).

979785353213 is an equidigital number, since it uses as much as digits as its factorization.

979785353213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 62.

The spelling of 979785353213 in words is "nine hundred seventy-nine billion, seven hundred eighty-five million, three hundred fifty-three thousand, two hundred thirteen".