100645505 has 8 divisors (see below), whose sum is σ = 121036032. Its totient is φ = 80342128.

The previous prime is 100645487. The next prime is 100645507. The reversal of 100645505 is 505546001.

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

It is a cyclic number.

It is not a de Polignac number, because 100645505 - 2⁸ = 100645249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100645507) 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 7 ways as a sum of consecutive naturals, for example, 19217 + ... + 23886.

It is an arithmetic number, because the mean of its divisors is an integer number (15129504).

Almost surely, 2^100645505 is an apocalyptic number.

It is an amenable number.

100645505 is a deficient number, since it is larger than the sum of its proper divisors (20390527).

100645505 is an equidigital number, since it uses as much as digits as its factorization.

100645505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43575.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 100645505 is about 10032.2233328410. The cubic root of 100645505 is about 465.1554650325.

The spelling of 100645505 in words is "one hundred million, six hundred forty-five thousand, five hundred five".