699561 has 12 divisors (see below), whose sum is σ = 1063920. Its totient is φ = 441720.

The previous prime is 699557. The next prime is 699571. The reversal of 699561 is 165996.

699561 is a `hidden beast` number, since 6 + 99 + 561 = 666.

699561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 699561 - 2² = 699557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (699511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (88660).

2⁶⁹⁹⁵⁶¹ is an apocalyptic number.

It is an amenable number.

699561 is a deficient number, since it is larger than the sum of its proper divisors (364359).

699561 is a wasteful number, since it uses less digits than its factorization.

699561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4113 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 699561 is about 836.3976327083. The cubic root of 699561 is about 88.7718348709.

It can be divided in two parts, 6995 and 61, that added together give a square (7056 = 84²).

The spelling of 699561 in words is "six hundred ninety-nine thousand, five hundred sixty-one".