99997669 has 2 divisors, whose sum is σ = 99997670. Its totient is φ = 99997668.

The previous prime is 99997649. The next prime is 99997679. The reversal of 99997669 is 96679999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96530625 + 3467044 = 9825^2 + 1862^2 .

It is a cyclic number.

It is not a de Polignac number, because 99997669 - 2¹⁵ = 99964901 is a prime.

It is a super-2 number, since 2×99997669² = 19999067610867122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99997669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99997609) 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, 49998834 + 49998835.

It is an arithmetic number, because the mean of its divisors is an integer number (49998835).

Almost surely, 2^99997669 is an apocalyptic number.

It is an amenable number.

99997669 is a deficient number, since it is larger than the sum of its proper divisors (1).

99997669 is an equidigital number, since it uses as much as digits as its factorization.

99997669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14880348, while the sum is 64.

The square root of 99997669 is about 9999.8834493208. The cubic root of 99997669 is about 464.1552768187.

The spelling of 99997669 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred sixty-nine".