671890101 has 4 divisors (see below), whose sum is σ = 895853472. Its totient is φ = 447926732.

The previous prime is 671890097. The next prime is 671890117. The reversal of 671890101 is 101098176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671890101 - 2² = 671890097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671890151) 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, 111981681 + ... + 111981686.

It is an arithmetic number, because the mean of its divisors is an integer number (223963368).

Almost surely, 2^671890101 is an apocalyptic number.

It is an amenable number.

671890101 is a deficient number, since it is larger than the sum of its proper divisors (223963371).

671890101 is a wasteful number, since it uses less digits than its factorization.

671890101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223963370.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 671890101 is about 25920.8429839772. The cubic root of 671890101 is about 875.8560768849.

The spelling of 671890101 in words is "six hundred seventy-one million, eight hundred ninety thousand, one hundred one".