6971821413 has 4 divisors (see below), whose sum is σ = 9295761888. Its totient is φ = 4647880940.

The previous prime is 6971821369. The next prime is 6971821429. The reversal of 6971821413 is 3141281796.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6971821413 - 2⁶ = 6971821349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6971821463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161970233 + ... + 1161970238.

It is an arithmetic number, because the mean of its divisors is an integer number (2323940472).

Almost surely, 2^6971821413 is an apocalyptic number.

It is an amenable number.

6971821413 is a deficient number, since it is larger than the sum of its proper divisors (2323940475).

6971821413 is a wasteful number, since it uses less digits than its factorization.

6971821413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323940474.

The product of its digits is 72576, while the sum is 42.

The square root of 6971821413 is about 83497.4335713380. The cubic root of 6971821413 is about 1910.3608880127.

The spelling of 6971821413 in words is "six billion, nine hundred seventy-one million, eight hundred twenty-one thousand, four hundred thirteen".