99865607 has 4 divisors (see below), whose sum is σ = 100835280. Its totient is φ = 98895936.

The previous prime is 99865603. The next prime is 99865613. The reversal of 99865607 is 70656899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70656899 = 41 ⋅1723339.

It is a cyclic number.

It is not a de Polignac number, because 99865607 - 2² = 99865603 is a prime.

It is a super-2 number, since 2×99865607² = 19946278922956898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99865603) 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, 484682 + ... + 484887.

It is an arithmetic number, because the mean of its divisors is an integer number (25208820).

Almost surely, 2^99865607 is an apocalyptic number.

99865607 is a deficient number, since it is larger than the sum of its proper divisors (969673).

99865607 is a wasteful number, since it uses less digits than its factorization.

99865607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969672.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 99865607 is about 9993.2780907968. The cubic root of 99865607 is about 463.9508577935.

The spelling of 99865607 in words is "ninety-nine million, eight hundred sixty-five thousand, six hundred seven".