671045541 has 4 divisors (see below), whose sum is σ = 894727392. Its totient is φ = 447363692.

The previous prime is 671045537. The next prime is 671045581. The reversal of 671045541 is 145540176.

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 671045541 - 2² = 671045537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671045581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111840921 + ... + 111840926.

It is an arithmetic number, because the mean of its divisors is an integer number (223681848).

Almost surely, 2^671045541 is an apocalyptic number.

It is an amenable number.

671045541 is a deficient number, since it is larger than the sum of its proper divisors (223681851).

671045541 is a wasteful number, since it uses less digits than its factorization.

671045541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223681850.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 671045541 is about 25904.5467244652. The cubic root of 671045541 is about 875.4889418622.

The spelling of 671045541 in words is "six hundred seventy-one million, forty-five thousand, five hundred forty-one".