671625693 has 6 divisors (see below), whose sum is σ = 970126014. Its totient is φ = 447750456.

The previous prime is 671625683. The next prime is 671625701. The reversal of 671625693 is 396526176.

It can be written as a sum of positive squares in only one way, i.e., 665485209 + 6140484 = 25797^2 + 2478^2 .

It is not a de Polignac number, because 671625693 - 2¹⁸ = 671363549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671625653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37312530 + ... + 37312547.

It is an arithmetic number, because the mean of its divisors is an integer number (161687669).

Almost surely, 2^671625693 is an apocalyptic number.

It is an amenable number.

671625693 is a deficient number, since it is larger than the sum of its proper divisors (298500321).

671625693 is a wasteful number, since it uses less digits than its factorization.

671625693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74625083 (or 74625080 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 671625693 is about 25915.7421850118. The cubic root of 671625693 is about 875.7411703260.

The spelling of 671625693 in words is "six hundred seventy-one million, six hundred twenty-five thousand, six hundred ninety-three".