100811643 has 8 divisors (see below), whose sum is σ = 138048528. Its totient is φ = 65391264.

The previous prime is 100811639. The next prime is 100811647. The reversal of 100811643 is 346118001.

It is an interprime number because it is at equal distance from previous prime (100811639) and next prime (100811647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100811643 - 2² = 100811639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100811647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453996 + ... + 454217.

It is an arithmetic number, because the mean of its divisors is an integer number (17256066).

Almost surely, 2^100811643 is an apocalyptic number.

100811643 is a deficient number, since it is larger than the sum of its proper divisors (37236885).

100811643 is an equidigital number, since it uses as much as digits as its factorization.

100811643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908253.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 100811643 is about 10040.5001369454. The cubic root of 100811643 is about 465.4112721678.

Adding to 100811643 its reverse (346118001), we get a palindrome (446929644).

The spelling of 100811643 in words is "one hundred million, eight hundred eleven thousand, six hundred forty-three".