99876865 has 8 divisors (see below), whose sum is σ = 130747968. Its totient is φ = 72637680.

The previous prime is 99876851. The next prime is 99876869. The reversal of 99876865 is 56867899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99876865 - 2¹³ = 99868673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99876869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907917 + ... + 908026.

It is an arithmetic number, because the mean of its divisors is an integer number (16343496).

It is a Proth number, since it is equal to 381 ⋅ 2¹⁸ + 1 and 381 < 2¹⁸.

Almost surely, 2^99876865 is an apocalyptic number.

It is an amenable number.

99876865 is a deficient number, since it is larger than the sum of its proper divisors (30871103).

99876865 is a wasteful number, since it uses less digits than its factorization.

99876865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815959.

The product of its digits is 6531840, while the sum is 58.

The square root of 99876865 is about 9993.8413535537. The cubic root of 99876865 is about 463.9682910976.

The spelling of 99876865 in words is "ninety-nine million, eight hundred seventy-six thousand, eight hundred sixty-five".