671985043 has 8 divisors (see below), whose sum is σ = 713088000. Its totient is φ = 631872648.

The previous prime is 671985023. The next prime is 671985049. The reversal of 671985043 is 340589176.

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 671985043 - 2⁵ = 671985011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671985049) 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, 246243 + ... + 248956.

It is an arithmetic number, because the mean of its divisors is an integer number (89136000).

Almost surely, 2^671985043 is an apocalyptic number.

671985043 is a deficient number, since it is larger than the sum of its proper divisors (41102957).

671985043 is a wasteful number, since it uses less digits than its factorization.

671985043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495281.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 671985043 is about 25922.6743026255. The cubic root of 671985043 is about 875.8973294703.

The spelling of 671985043 in words is "six hundred seventy-one million, nine hundred eighty-five thousand, forty-three".