99986669 has 2 divisors, whose sum is σ = 99986670. Its totient is φ = 99986668.

The previous prime is 99986657. The next prime is 99986699. The reversal of 99986669 is 96668999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80317444 + 19669225 = 8962^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 99986669 - 2¹² = 99982573 is a prime.

It is a super-2 number, since 2×99986669² = 19994667955431122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99986609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993334 + 49993335.

It is an arithmetic number, because the mean of its divisors is an integer number (49993335).

Almost surely, 2^99986669 is an apocalyptic number.

It is an amenable number.

99986669 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986669 is an equidigital number, since it uses as much as digits as its factorization.

99986669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 62.

The square root of 99986669 is about 9999.3334277841. Note that the first 3 decimals coincide. The cubic root of 99986669 is about 464.1382567711.

The spelling of 99986669 in words is "ninety-nine million, nine hundred eighty-six thousand, six hundred sixty-nine".