99644395 has 16 divisors (see below), whose sum is σ = 132114240. Its totient is φ = 71762944.

The previous prime is 99644393. The next prime is 99644407. The reversal of 99644395 is 59344699.

It is not a de Polignac number, because 99644395 - 2¹ = 99644393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99644393) 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 15 ways as a sum of consecutive naturals, for example, 23530 + ... + 27439.

It is an arithmetic number, because the mean of its divisors is an integer number (8257140).

Almost surely, 2^99644395 is an apocalyptic number.

99644395 is a deficient number, since it is larger than the sum of its proper divisors (32469845).

99644395 is a wasteful number, since it uses less digits than its factorization.

99644395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51014.

The product of its digits is 1049760, while the sum is 49.

The square root of 99644395 is about 9982.2039149679. The cubic root of 99644395 is about 463.6080391688.

The spelling of 99644395 in words is "ninety-nine million, six hundred forty-four thousand, three hundred ninety-five".