101804947 has 4 divisors (see below), whose sum is σ = 102582216. Its totient is φ = 101027680.

The previous prime is 101804939. The next prime is 101804981. The reversal of 101804947 is 749408101.

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 101804947 - 2³ = 101804939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101804047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388438 + ... + 388699.

It is an arithmetic number, because the mean of its divisors is an integer number (25645554).

Almost surely, 2^101804947 is an apocalyptic number.

101804947 is a deficient number, since it is larger than the sum of its proper divisors (777269).

101804947 is an equidigital number, since it uses as much as digits as its factorization.

101804947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777268.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 101804947 is about 10089.8437549845. The cubic root of 101804947 is about 466.9348554255.

The spelling of 101804947 in words is "one hundred one million, eight hundred four thousand, nine hundred forty-seven".