99690489 has 12 divisors (see below), whose sum is σ = 145483156. Its totient is φ = 65774592.

The previous prime is 99690467. The next prime is 99690491. The reversal of 99690489 is 98409699.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67371264 + 32319225 = 8208^2 + 5685^2 .

It is not a de Polignac number, because 99690489 - 2⁵ = 99690457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99690449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56224 + ... + 57969.

Almost surely, 2^99690489 is an apocalyptic number.

It is an amenable number.

99690489 is a deficient number, since it is larger than the sum of its proper divisors (45792667).

99690489 is a wasteful number, since it uses less digits than its factorization.

99690489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114296 (or 114293 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 99690489 is about 9984.5124568003. The cubic root of 99690489 is about 463.6795141867.

The spelling of 99690489 in words is "ninety-nine million, six hundred ninety thousand, four hundred eighty-nine".