6893963781 has 24 divisors (see below), whose sum is σ = 10020959520. Its totient is φ = 4203912384.

The previous prime is 6893963779. The next prime is 6893963789. The reversal of 6893963781 is 1873693986.

It is not a de Polignac number, because 6893963781 - 2¹ = 6893963779 is a prime.

It is a super-2 number, since 2×6893963781² = 95053473227479631922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6893963789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23970 + ... + 119843.

It is an arithmetic number, because the mean of its divisors is an integer number (417539980).

Almost surely, 2^6893963781 is an apocalyptic number.

It is an amenable number.

6893963781 is a deficient number, since it is larger than the sum of its proper divisors (3126995739).

6893963781 is a wasteful number, since it uses less digits than its factorization.

6893963781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143893 (or 143864 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 60.

The square root of 6893963781 is about 83029.8969106912. The cubic root of 6893963781 is about 1903.2229491537. Note that the first 3 decimals are identical.

The spelling of 6893963781 in words is "six billion, eight hundred ninety-three million, nine hundred sixty-three thousand, seven hundred eighty-one".