699809161 has 4 divisors (see below), whose sum is σ = 700382592. Its totient is φ = 699235732.

The previous prime is 699809153. The next prime is 699809177. The reversal of 699809161 is 161908996.

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 699809161 - 2³ = 699809153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699809101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284881 + ... + 287326.

It is an arithmetic number, because the mean of its divisors is an integer number (175095648).

Almost surely, 2^699809161 is an apocalyptic number.

It is an amenable number.

699809161 is a deficient number, since it is larger than the sum of its proper divisors (573431).

699809161 is a wasteful number, since it uses less digits than its factorization.

699809161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573430.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 699809161 is about 26453.9063467005. The cubic root of 699809161 is about 887.8233054985.

The spelling of 699809161 in words is "six hundred ninety-nine million, eight hundred nine thousand, one hundred sixty-one".