99469865 has 12 divisors (see below), whose sum is σ = 131202372. Its totient is φ = 72341280.

The previous prime is 99469861. The next prime is 99469889. The reversal of 99469865 is 56896499.

99469865 = 1195² + 1196² + ... + 1260².

It can be written as a sum of positive squares in 2 ways, for example, as 68244121 + 31225744 = 8261^2 + 5588^2 .

It is not a de Polignac number, because 99469865 - 2² = 99469861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99469865.

It is not an unprimeable number, because it can be changed into a prime (99469861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81602 + ... + 82811.

It is an arithmetic number, because the mean of its divisors is an integer number (10933531).

Almost surely, 2^99469865 is an apocalyptic number.

It is an amenable number.

99469865 is a deficient number, since it is larger than the sum of its proper divisors (31732507).

99469865 is a wasteful number, since it uses less digits than its factorization.

99469865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164440 (or 164429 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The square root of 99469865 is about 9973.4580261813. The cubic root of 99469865 is about 463.3372067490.

It can be divided in two parts, 99 and 469865, that added together give a palindrome (469964).

The spelling of 99469865 in words is "ninety-nine million, four hundred sixty-nine thousand, eight hundred sixty-five".