671540901 has 8 divisors (see below), whose sum is σ = 900750144. Its totient is φ = 445012800.

The previous prime is 671540869. The next prime is 671540939. The reversal of 671540901 is 109045176.

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

It is not a de Polignac number, because 671540901 - 2⁵ = 671540869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671540201) 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 7 ways as a sum of consecutive naturals, for example, 669700 + ... + 670701.

It is an arithmetic number, because the mean of its divisors is an integer number (112593768).

Almost surely, 2^671540901 is an apocalyptic number.

It is an amenable number.

671540901 is a deficient number, since it is larger than the sum of its proper divisors (229209243).

671540901 is a wasteful number, since it uses less digits than its factorization.

671540901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340571.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 671540901 is about 25914.1062164992. The cubic root of 671540901 is about 875.7043149907.

The spelling of 671540901 in words is "six hundred seventy-one million, five hundred forty thousand, nine hundred one".