100117643 has 4 divisors (see below), whose sum is σ = 104470608. Its totient is φ = 95764680.

The previous prime is 100117639. The next prime is 100117651. The reversal of 100117643 is 346711001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100117643 - 2² = 100117639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 4352941 = 100117643 / (1 + 0 + 0 + 1 + 1 + 7 + 6 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100117603) 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 3 ways as a sum of consecutive naturals, for example, 2176448 + ... + 2176493.

It is an arithmetic number, because the mean of its divisors is an integer number (26117652).

Almost surely, 2^100117643 is an apocalyptic number.

100117643 is a deficient number, since it is larger than the sum of its proper divisors (4352965).

100117643 is an equidigital number, since it uses as much as digits as its factorization.

100117643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352964.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 100117643 is about 10005.8804210324. The cubic root of 100117643 is about 464.3408288429.

Adding to 100117643 its reverse (346711001), we get a palindrome (446828644).

The spelling of 100117643 in words is "one hundred million, one hundred seventeen thousand, six hundred forty-three".