8470891 has 16 divisors (see below), whose sum is σ = 10227168. Its totient is φ = 6912000.

The previous prime is 8470883. The next prime is 8470907. The reversal of 8470891 is 1980748.

It is a 11-Lehmer number, since φ(8470891) divides (8470891-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 8470891 - 2³ = 8470883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

8470891 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8470891.

It is not an unprimeable number, because it can be changed into a prime (8470801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4491 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (639198).

Almost surely, 2^8470891 is an apocalyptic number.

8470891 is a deficient number, since it is larger than the sum of its proper divisors (1756277).

8470891 is a wasteful number, since it uses less digits than its factorization.

8470891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 8470891 is about 2910.4795137571. The cubic root of 8470891 is about 203.8495221833.

The spelling of 8470891 in words is "eight million, four hundred seventy thousand, eight hundred ninety-one".