671328101 has 4 divisors (see below), whose sum is σ = 672969900. Its totient is φ = 669686304.

The previous prime is 671328067. The next prime is 671328131. The reversal of 671328101 is 101823176.

It is a Cunningham number, because it is equal to 25910²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 613552900 + 57775201 = 24770^2 + 7601^2 .

It is a cyclic number.

It is not a de Polignac number, because 671328101 - 2¹⁴ = 671311717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671328131) 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, 820286 + ... + 821103.

It is an arithmetic number, because the mean of its divisors is an integer number (168242475).

Almost surely, 2^671328101 is an apocalyptic number.

It is an amenable number.

671328101 is a deficient number, since it is larger than the sum of its proper divisors (1641799).

671328101 is a wasteful number, since it uses less digits than its factorization.

671328101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641798.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 671328101 is about 25910.0000192976. Note that the first 4 decimals coincide. The cubic root of 671328101 is about 875.6118065695.

The spelling of 671328101 in words is "six hundred seventy-one million, three hundred twenty-eight thousand, one hundred one".