6403821697 has 8 divisors (see below), whose sum is σ = 7881626816. Its totient is φ = 5066759952.

The previous prime is 6403821689. The next prime is 6403821719. The reversal of 6403821697 is 7961283046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6403821697 - 2³ = 6403821689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6403821797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35185743 + ... + 35185924.

It is an arithmetic number, because the mean of its divisors is an integer number (985203352).

Almost surely, 2^6403821697 is an apocalyptic number.

It is an amenable number.

6403821697 is a deficient number, since it is larger than the sum of its proper divisors (1477805119).

6403821697 is a wasteful number, since it uses less digits than its factorization.

6403821697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70371687.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 6403821697 is about 80023.8820415506. The cubic root of 6403821697 is about 1857.0050171212.

It can be divided in two parts, 6403 and 821697, that added together give a square (828100 = 910²).

The spelling of 6403821697 in words is "six billion, four hundred three million, eight hundred twenty-one thousand, six hundred ninety-seven".