99665213 has 4 divisors (see below), whose sum is σ = 99700380. Its totient is φ = 99630048.

The previous prime is 99665191. The next prime is 99665261. The reversal of 99665213 is 31256699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68773849 + 30891364 = 8293^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 99665213 - 2⁶ = 99665149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99665263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12920 + ... + 19137.

It is an arithmetic number, because the mean of its divisors is an integer number (24925095).

Almost surely, 2^99665213 is an apocalyptic number.

It is an amenable number.

99665213 is a deficient number, since it is larger than the sum of its proper divisors (35167).

99665213 is a wasteful number, since it uses less digits than its factorization.

99665213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35166.

The product of its digits is 87480, while the sum is 41.

The square root of 99665213 is about 9983.2466162066. The cubic root of 99665213 is about 463.6403230389.

The spelling of 99665213 in words is "ninety-nine million, six hundred sixty-five thousand, two hundred thirteen".