6821363434 has 4 divisors (see below), whose sum is σ = 10232045154. Its totient is φ = 3410681716.

The previous prime is 6821363431. The next prime is 6821363447. The reversal of 6821363434 is 4343631286.

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

It can be written as a sum of positive squares in only one way, i.e., 5225121225 + 1596242209 = 72285^2 + 39953^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6821363431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705340857 + ... + 1705340860.

Almost surely, 2^6821363434 is an apocalyptic number.

6821363434 is a deficient number, since it is larger than the sum of its proper divisors (3410681720).

6821363434 is a wasteful number, since it uses less digits than its factorization.

6821363434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410681719.

The product of its digits is 248832, while the sum is 40.

The square root of 6821363434 is about 82591.5457780032. The cubic root of 6821363434 is about 1896.5184103271.

The spelling of 6821363434 in words is "six billion, eight hundred twenty-one million, three hundred sixty-three thousand, four hundred thirty-four".