1608680699 has 4 divisors (see below), whose sum is σ = 1610558664. Its totient is φ = 1606802736.

The previous prime is 1608680683. The next prime is 1608680707. The reversal of 1608680699 is 9960868061.

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 1608680699 - 2⁴ = 1608680683 is a prime.

It is a super-3 number, since 3×1608680699³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1608680699.

It is not an unprimeable number, because it can be changed into a prime (1608680629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937697 + ... + 939410.

It is an arithmetic number, because the mean of its divisors is an integer number (402639666).

Almost surely, 2^1608680699 is an apocalyptic number.

1608680699 is a deficient number, since it is larger than the sum of its proper divisors (1877965).

1608680699 is an equidigital number, since it uses as much as digits as its factorization.

1608680699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877964.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 1608680699 is about 40108.3619585742. The cubic root of 1608680699 is about 1171.7184912825.

The spelling of 1608680699 in words is "one billion, six hundred eight million, six hundred eighty thousand, six hundred ninety-nine".