867491617 has 8 divisors (see below), whose sum is σ = 872497640. Its totient is φ = 862496640.

The previous prime is 867491609. The next prime is 867491663. The reversal of 867491617 is 716194768.

It can be written as a sum of positive squares in 4 ways, for example, as 87909376 + 779582241 = 9376^2 + 27921^2 .

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 867491617 - 2³ = 867491609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867491917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193117 + ... + 197557.

It is an arithmetic number, because the mean of its divisors is an integer number (109062205).

Almost surely, 2^867491617 is an apocalyptic number.

It is an amenable number.

867491617 is a deficient number, since it is larger than the sum of its proper divisors (5006023).

867491617 is a wasteful number, since it uses less digits than its factorization.

867491617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523.

The product of its digits is 508032, while the sum is 49.

The square root of 867491617 is about 29453.2106399285. The cubic root of 867491617 is about 953.7219151917.

The spelling of 867491617 in words is "eight hundred sixty-seven million, four hundred ninety-one thousand, six hundred seventeen".