699463364981 has 2 divisors, whose sum is σ = 699463364982. Its totient is φ = 699463364980.

The previous prime is 699463364903. The next prime is 699463364987. The reversal of 699463364981 is 189463364996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518783110756 + 180680254225 = 720266^2 + 425065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-699463364981 is a prime.

It is a super-2 number, since 2×699463364981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699463364987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349731682490 + 349731682491.

It is an arithmetic number, because the mean of its divisors is an integer number (349731682491).

Almost surely, 2^699463364981 is an apocalyptic number.

It is an amenable number.

699463364981 is a deficient number, since it is larger than the sum of its proper divisors (1).

699463364981 is an equidigital number, since it uses as much as digits as its factorization.

699463364981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181398528, while the sum is 68.

The spelling of 699463364981 in words is "six hundred ninety-nine billion, four hundred sixty-three million, three hundred sixty-four thousand, nine hundred eighty-one".