8421170491 has 8 divisors (see below), whose sum is σ = 8750394368. Its totient is φ = 8095545000.

The previous prime is 8421170489. The next prime is 8421170501. The reversal of 8421170491 is 1940711248.

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 8421170491 - 2¹ = 8421170489 is a prime.

It is a super-2 number, since 2×8421170491² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8421170491.

It is not an unprimeable number, because it can be changed into a prime (8421170411) 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, 894825 + ... + 904186.

It is an arithmetic number, because the mean of its divisors is an integer number (1093799296).

Almost surely, 2^8421170491 is an apocalyptic number.

8421170491 is a deficient number, since it is larger than the sum of its proper divisors (329223877).

8421170491 is a wasteful number, since it uses less digits than its factorization.

8421170491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799193.

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

The square root of 8421170491 is about 91766.9357176102. The cubic root of 8421170491 is about 2034.4990277784.

The spelling of 8421170491 in words is "eight billion, four hundred twenty-one million, one hundred seventy thousand, four hundred ninety-one".