6978934491 has 4 divisors (see below), whose sum is σ = 9305245992. Its totient is φ = 4652622992.

The previous prime is 6978934447. The next prime is 6978934531. The reversal of 6978934491 is 1944398796.

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

It is a cyclic number.

It is not a de Polignac number, because 6978934491 - 2²² = 6974740187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6978934691) 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, 1163155746 + ... + 1163155751.

It is an arithmetic number, because the mean of its divisors is an integer number (2326311498).

Almost surely, 2^6978934491 is an apocalyptic number.

6978934491 is a deficient number, since it is larger than the sum of its proper divisors (2326311501).

6978934491 is a wasteful number, since it uses less digits than its factorization.

6978934491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326311500.

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

The square root of 6978934491 is about 83540.0173030865. The cubic root of 6978934491 is about 1911.0103561372.

The spelling of 6978934491 in words is "six billion, nine hundred seventy-eight million, nine hundred thirty-four thousand, four hundred ninety-one".