99621845 has 16 divisors (see below), whose sum is σ = 127908480. Its totient is φ = 74260800.

The previous prime is 99621839. The next prime is 99621869. The reversal of 99621845 is 54812699.

It is not a de Polignac number, because 99621845 - 2¹⁴ = 99605461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99621796 and 99621805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2801 + ... + 14390.

It is an arithmetic number, because the mean of its divisors is an integer number (7994280).

Almost surely, 2^99621845 is an apocalyptic number.

99621845 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

99621845 is a deficient number, since it is larger than the sum of its proper divisors (28286635).

99621845 is a wasteful number, since it uses less digits than its factorization.

99621845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17276.

The product of its digits is 155520, while the sum is 44.

The square root of 99621845 is about 9981.0743409715. The cubic root of 99621845 is about 463.5730642964.

The spelling of 99621845 in words is "ninety-nine million, six hundred twenty-one thousand, eight hundred forty-five".