870840099 has 32 divisors (see below), whose sum is σ = 1348508160. Its totient is φ = 554377824.

The previous prime is 870840083. The next prime is 870840121. The reversal of 870840099 is 990048078.

It is a Cunningham number, because it is equal to 29510²-1.

It is not a de Polignac number, because 870840099 - 2⁴ = 870840083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (870820099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678112 + ... + 679394.

It is an arithmetic number, because the mean of its divisors is an integer number (42140880).

Almost surely, 2^870840099 is an apocalyptic number.

870840099 is a deficient number, since it is larger than the sum of its proper divisors (477668061).

870840099 is a wasteful number, since it uses less digits than its factorization.

870840099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 870840099 is about 29509.9999830566. Note that the first 4 decimals coincide. The cubic root of 870840099 is about 954.9474488412.

The spelling of 870840099 in words is "eight hundred seventy million, eight hundred forty thousand, ninety-nine".