6989763853 has 8 divisors (see below), whose sum is σ = 7001491896. Its totient is φ = 6978048000.

The previous prime is 6989763841. The next prime is 6989763899. The reversal of 6989763853 is 3583679896.

It can be written as a sum of positive squares in 4 ways, for example, as 487438084 + 6502325769 = 22078^2 + 80637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6989763853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6989761853) 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, 2494053 + ... + 2496853.

It is an arithmetic number, because the mean of its divisors is an integer number (875186487).

Almost surely, 2^6989763853 is an apocalyptic number.

It is an amenable number.

6989763853 is a deficient number, since it is larger than the sum of its proper divisors (11728043).

6989763853 is a wasteful number, since it uses less digits than its factorization.

6989763853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095.

The product of its digits is 58786560, while the sum is 64.

The square root of 6989763853 is about 83604.8075950181. The cubic root of 6989763853 is about 1911.9982971987.

The spelling of 6989763853 in words is "six billion, nine hundred eighty-nine million, seven hundred sixty-three thousand, eight hundred fifty-three".