867649 has 4 divisors (see below), whose sum is σ = 873136. Its totient is φ = 862164.

The previous prime is 867641. The next prime is 867653. The reversal of 867649 is 946768.

867649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 867649 - 2³ = 867641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2499 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (218284).

2⁸⁶⁷⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

867649 is a deficient number, since it is larger than the sum of its proper divisors (5487).

867649 is a wasteful number, since it uses less digits than its factorization.

867649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486.

The product of its digits is 72576, while the sum is 40.

The square root of 867649 is about 931.4767844665. The cubic root of 867649 is about 95.3779587426.

The spelling of 867649 in words is "eight hundred sixty-seven thousand, six hundred forty-nine".