63840099 has 16 divisors (see below), whose sum is σ = 87208704. Its totient is φ = 41527200.

The previous prime is 63840089. The next prime is 63840103. The reversal of 63840099 is 99004836.

It is a Cunningham number, because it is equal to 7990²-1.

It is not a de Polignac number, because 63840099 - 2¹¹ = 63838051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63840089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22642 + ... + 25304.

It is an arithmetic number, because the mean of its divisors is an integer number (5450544).

Almost surely, 2^63840099 is an apocalyptic number.

63840099 is a deficient number, since it is larger than the sum of its proper divisors (23368605).

63840099 is a wasteful number, since it uses less digits than its factorization.

63840099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 63840099 is about 7989.9999374218. Note that the first 4 decimals coincide. The cubic root of 63840099 is about 399.6665950968. Note that the first 3 decimals are identical.

The spelling of 63840099 in words is "sixty-three million, eight hundred forty thousand, ninety-nine".