6689020293 has 6 divisors (see below), whose sum is σ = 9661918214. Its totient is φ = 4459346856.

The previous prime is 6689020279. The next prime is 6689020301. The reversal of 6689020293 is 3920209866.

It can be written as a sum of positive squares in only one way, i.e., 6687477729 + 1542564 = 81777^2 + 1242^2 .

It is not a de Polignac number, because 6689020293 - 2¹³ = 6689012101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689020193) 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, 371612230 + ... + 371612247.

Almost surely, 2^6689020293 is an apocalyptic number.

It is an amenable number.

6689020293 is a deficient number, since it is larger than the sum of its proper divisors (2972897921).

6689020293 is a wasteful number, since it uses less digits than its factorization.

6689020293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743224483 (or 743224480 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 6689020293 is about 81786.4309833850. The cubic root of 6689020293 is about 1884.1732678014.

The spelling of 6689020293 in words is "six billion, six hundred eighty-nine million, twenty thousand, two hundred ninety-three".