699916669 has 2 divisors, whose sum is σ = 699916670. Its totient is φ = 699916668.

The previous prime is 699916619. The next prime is 699916691. The reversal of 699916669 is 966619996.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676520100 + 23396569 = 26010^2 + 4837^2 .

It is a cyclic number.

It is not a de Polignac number, because 699916669 - 2⁷ = 699916541 is a prime.

It is a super-2 number, since 2×699916669² = 979766687088111122, which contains 22 as substring.

699916669 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699916619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349958334 + 349958335.

It is an arithmetic number, because the mean of its divisors is an integer number (349958335).

Almost surely, 2^699916669 is an apocalyptic number.

It is an amenable number.

699916669 is a deficient number, since it is larger than the sum of its proper divisors (1).

699916669 is an equidigital number, since it uses as much as digits as its factorization.

699916669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8503056, while the sum is 61.

The square root of 699916669 is about 26455.9382559001. The cubic root of 699916669 is about 887.8687670452.

The spelling of 699916669 in words is "six hundred ninety-nine million, nine hundred sixteen thousand, six hundred sixty-nine".