6821498899 has 2 divisors, whose sum is σ = 6821498900. Its totient is φ = 6821498898.

The previous prime is 6821498851. The next prime is 6821498903. The reversal of 6821498899 is 9988941286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6821498899 - 2¹⁵ = 6821466131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6821498899.

It is not a weakly prime, because it can be changed into another prime (6821499899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410749449 + 3410749450.

It is an arithmetic number, because the mean of its divisors is an integer number (3410749450).

Almost surely, 2^6821498899 is an apocalyptic number.

6821498899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6821498899 is an equidigital number, since it uses as much as digits as its factorization.

6821498899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 64.

The square root of 6821498899 is about 82592.3658639223. The cubic root of 6821498899 is about 1896.5309645214.

The spelling of 6821498899 in words is "six billion, eight hundred twenty-one million, four hundred ninety-eight thousand, eight hundred ninety-nine".