6899724947 has 2 divisors, whose sum is σ = 6899724948. Its totient is φ = 6899724946.

The previous prime is 6899724913. The next prime is 6899724959. The reversal of 6899724947 is 7494279986.

6899724947 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6899724947 - 2¹² = 6899720851 is a prime.

It is not a weakly prime, because it can be changed into another prime (6899724967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449862473 + 3449862474.

It is an arithmetic number, because the mean of its divisors is an integer number (3449862474).

Almost surely, 2^6899724947 is an apocalyptic number.

6899724947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6899724947 is an equidigital number, since it uses as much as digits as its factorization.

6899724947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 65.

The square root of 6899724947 is about 83064.5829881785. The cubic root of 6899724947 is about 1903.7529650126.

The spelling of 6899724947 in words is "six billion, eight hundred ninety-nine million, seven hundred twenty-four thousand, nine hundred forty-seven".