671040997 has 8 divisors (see below), whose sum is σ = 732343680. Its totient is φ = 609788160.

The previous prime is 671040989. The next prime is 671041001. The reversal of 671040997 is 799040176.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 671040997 - 2³ = 671040989 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 (671040967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19204 + ... + 41362.

It is an arithmetic number, because the mean of its divisors is an integer number (91542960).

Almost surely, 2^671040997 is an apocalyptic number.

It is an amenable number.

671040997 is a deficient number, since it is larger than the sum of its proper divisors (61302683).

671040997 is a wasteful number, since it uses less digits than its factorization.

671040997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24923.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 671040997 is about 25904.4590177058. The cubic root of 671040997 is about 875.4869657267.

The spelling of 671040997 in words is "six hundred seventy-one million, forty thousand, nine hundred ninety-seven".