99858645 has 12 divisors (see below), whose sum is σ = 173088396. Its totient is φ = 53257920.

The previous prime is 99858643. The next prime is 99858659. The reversal of 99858645 is 54685899.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47238129 + 52620516 = 6873^2 + 7254^2 .

It is not a de Polignac number, because 99858645 - 2¹ = 99858643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99858591 and 99858600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99858641) 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, 1109496 + ... + 1109585.

It is an arithmetic number, because the mean of its divisors is an integer number (14424033).

Almost surely, 2^99858645 is an apocalyptic number.

It is an amenable number.

99858645 is a deficient number, since it is larger than the sum of its proper divisors (73229751).

99858645 is a wasteful number, since it uses less digits than its factorization.

99858645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219092 (or 2219089 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 99858645 is about 9992.9297505787. The cubic root of 99858645 is about 463.9400763008.

The spelling of 99858645 in words is "ninety-nine million, eight hundred fifty-eight thousand, six hundred forty-five".