671696493 has 16 divisors (see below), whose sum is σ = 1015250880. Its totient is φ = 391595904.

The previous prime is 671696491. The next prime is 671696527. The reversal of 671696493 is 394696176.

It is not a de Polignac number, because 671696493 - 2¹ = 671696491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671696491) 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, 452496 + ... + 453977.

It is an arithmetic number, because the mean of its divisors is an integer number (63453180).

Almost surely, 2^671696493 is an apocalyptic number.

It is an amenable number.

671696493 is a deficient number, since it is larger than the sum of its proper divisors (343554387).

671696493 is a wasteful number, since it uses less digits than its factorization.

671696493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906508.

The product of its digits is 1469664, while the sum is 51.

The square root of 671696493 is about 25917.1081141396. The cubic root of 671696493 is about 875.7719415810.

The spelling of 671696493 in words is "six hundred seventy-one million, six hundred ninety-six thousand, four hundred ninety-three".