699955 has 4 divisors (see below), whose sum is σ = 839952. Its totient is φ = 559960.

The previous prime is 699953. The next prime is 699961. The reversal of 699955 is 559996.

It is a happy number.

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

It is not a de Polignac number, because 699955 - 2¹ = 699953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69991 + ... + 70000.

It is an arithmetic number, because the mean of its divisors is an integer number (209988).

2⁶⁹⁹⁹⁵⁵ is an apocalyptic number.

699955 is a deficient number, since it is larger than the sum of its proper divisors (139997).

699955 is a wasteful number, since it uses less digits than its factorization.

699955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139996.

The product of its digits is 109350, while the sum is 43.

The square root of 699955 is about 836.6331334581. The cubic root of 699955 is about 88.7884974821.

The spelling of 699955 in words is "six hundred ninety-nine thousand, nine hundred fifty-five".