671946403 has 16 divisors (see below), whose sum is σ = 744629760. Its totient is φ = 603112576.

The previous prime is 671946389. The next prime is 671946439. The reversal of 671946403 is 304649176.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671946403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671926403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137976 + ... + 142762.

It is an arithmetic number, because the mean of its divisors is an integer number (46539360).

Almost surely, 2^671946403 is an apocalyptic number.

671946403 is a deficient number, since it is larger than the sum of its proper divisors (72683357).

671946403 is a wasteful number, since it uses less digits than its factorization.

671946403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 671946403 is about 25921.9289984368. The cubic root of 671946403 is about 875.8805407426.

The spelling of 671946403 in words is "six hundred seventy-one million, nine hundred forty-six thousand, four hundred three".