208942070699 has 4 divisors (see below), whose sum is σ = 209533974936. Its totient is φ = 208350166464.

The previous prime is 208942070693. The next prime is 208942070737. The reversal of 208942070699 is 996070249802.

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

It is a cyclic number.

It is not a de Polignac number, because 208942070699 - 2⁸ = 208942070443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208942070693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295951589 + ... + 295952294.

It is an arithmetic number, because the mean of its divisors is an integer number (52383493734).

Almost surely, 2^208942070699 is an apocalyptic number.

208942070699 is a deficient number, since it is larger than the sum of its proper divisors (591904237).

208942070699 is an equidigital number, since it uses as much as digits as its factorization.

208942070699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591904236.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 208942070699 in words is "two hundred eight billion, nine hundred forty-two million, seventy thousand, six hundred ninety-nine".