699486453783421 has 2 divisors, whose sum is σ = 699486453783422. Its totient is φ = 699486453783420.

The previous prime is 699486453783373. The next prime is 699486453783427. The reversal of 699486453783421 is 124387354684996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538982005952196 + 160504447831225 = 23215986^2 + 12669035^2 .

It is a cyclic number.

It is not a de Polignac number, because 699486453783421 - 2³⁹ = 698936697969533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699486453783427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349743226891710 + 349743226891711.

It is an arithmetic number, because the mean of its divisors is an integer number (349743226891711).

Almost surely, 2^{699486453783421} is an apocalyptic number.

It is an amenable number.

699486453783421 is a deficient number, since it is larger than the sum of its proper divisors (1).

699486453783421 is an equidigital number, since it uses as much as digits as its factorization.

699486453783421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7524679680, while the sum is 79.

The spelling of 699486453783421 in words is "six hundred ninety-nine trillion, four hundred eighty-six billion, four hundred fifty-three million, seven hundred eighty-three thousand, four hundred twenty-one".