7081691899 has 2 divisors, whose sum is σ = 7081691900. Its totient is φ = 7081691898.

The previous prime is 7081691783. The next prime is 7081691909. The reversal of 7081691899 is 9981961807.

It is a strong prime.

It is an emirp because it is prime and its reverse (9981961807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7081691899 - 2¹⁵ = 7081659131 is a prime.

It is not a weakly prime, because it can be changed into another prime (7081691699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540845949 + 3540845950.

It is an arithmetic number, because the mean of its divisors is an integer number (3540845950).

Almost surely, 2^7081691899 is an apocalyptic number.

7081691899 is a deficient number, since it is larger than the sum of its proper divisors (1).

7081691899 is an equidigital number, since it uses as much as digits as its factorization.

7081691899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The square root of 7081691899 is about 84152.7890149816. The cubic root of 7081691899 is about 1920.3438962814.

The spelling of 7081691899 in words is "seven billion, eighty-one million, six hundred ninety-one thousand, eight hundred ninety-nine".