699680161 has 4 divisors (see below), whose sum is σ = 700065792. Its totient is φ = 699294532.

The previous prime is 699680153. The next prime is 699680173. The reversal of 699680161 is 161086996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 699680161 - 2³ = 699680153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699680131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190081 + ... + 193726.

It is an arithmetic number, because the mean of its divisors is an integer number (175016448).

Almost surely, 2^699680161 is an apocalyptic number.

It is an amenable number.

699680161 is a deficient number, since it is larger than the sum of its proper divisors (385631).

699680161 is a wasteful number, since it uses less digits than its factorization.

699680161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385630.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 699680161 is about 26451.4680310942. The cubic root of 699680161 is about 887.7687495563.

The spelling of 699680161 in words is "six hundred ninety-nine million, six hundred eighty thousand, one hundred sixty-one".