870249999 has 8 divisors (see below), whose sum is σ = 1160490672. Its totient is φ = 580088000.

The previous prime is 870249967. The next prime is 870250001. The reversal of 870249999 is 999942078.

It is a Cunningham number, because it is equal to 29500²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 870249999 - 2⁵ = 870249967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870249929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14749 + ... + 44249.

It is an arithmetic number, because the mean of its divisors is an integer number (145061334).

Almost surely, 2^870249999 is an apocalyptic number.

870249999 is a deficient number, since it is larger than the sum of its proper divisors (290240673).

870249999 is a wasteful number, since it uses less digits than its factorization.

870249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39337.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The square root of 870249999 is about 29499.9999830508. Note that the first 4 decimals coincide. The cubic root of 870249999 is about 954.7317024520.

The spelling of 870249999 in words is "eight hundred seventy million, two hundred forty-nine thousand, nine hundred ninety-nine".