6943240091 has 4 divisors (see below), whose sum is σ = 7308673800. Its totient is φ = 6577806384.

The previous prime is 6943240081. The next prime is 6943240099. The reversal of 6943240091 is 1900423496.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6943240091 - 2³⁰ = 5869498267 is a prime.

It is a super-2 number, since 2×6943240091² = 96417165922539376562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6943240099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182716826 + ... + 182716863.

It is an arithmetic number, because the mean of its divisors is an integer number (1827168450).

Almost surely, 2^6943240091 is an apocalyptic number.

6943240091 is a deficient number, since it is larger than the sum of its proper divisors (365433709).

6943240091 is a wasteful number, since it uses less digits than its factorization.

6943240091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365433708.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6943240091 is about 83326.1068993386. The cubic root of 6943240091 is about 1907.7467733025.

The spelling of 6943240091 in words is "six billion, nine hundred forty-three million, two hundred forty thousand, ninety-one".