870099 has 4 divisors (see below), whose sum is σ = 1160136. Its totient is φ = 580064.

The previous prime is 870097. The next prime is 870109. The reversal of 870099 is 990078.

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 870099 - 2¹ = 870097 is a prime.

It is a D-number.

870099 is a modest number, since divided by 99 gives 87 as remainder.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870099.

It is not an unprimeable number, because it can be changed into a prime (870097) 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, 145014 + ... + 145019.

It is an arithmetic number, because the mean of its divisors is an integer number (290034).

2⁸⁷⁰⁰⁹⁹ is an apocalyptic number.

870099 is a deficient number, since it is larger than the sum of its proper divisors (290037).

870099 is a wasteful number, since it uses less digits than its factorization.

870099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290036.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 870099 is about 932.7909733697. The cubic root of 870099 is about 95.4676480056.

It can be divided in two parts, 8 and 70099, that added together give a palindrome (70107).

The spelling of 870099 in words is "eight hundred seventy thousand, ninety-nine".