870500091 has 8 divisors (see below), whose sum is σ = 1167151680. Its totient is φ = 577090952.

The previous prime is 870500087. The next prime is 870500093. The reversal of 870500091 is 190005078.

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 870500091 - 2² = 870500087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (870500093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809985 + ... + 811058.

It is an arithmetic number, because the mean of its divisors is an integer number (145893960).

Almost surely, 2^870500091 is an apocalyptic number.

870500091 is a deficient number, since it is larger than the sum of its proper divisors (296651589).

870500091 is a wasteful number, since it uses less digits than its factorization.

870500091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621225.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 870500091 is about 29504.2385260152. The cubic root of 870500091 is about 954.8231504621.

The spelling of 870500091 in words is "eight hundred seventy million, five hundred thousand, ninety-one".