807649 has 4 divisors (see below), whose sum is σ = 810160. Its totient is φ = 805140.

The previous prime is 807647. The next prime is 807689. The reversal of 807649 is 946708.

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 807649 - 2¹ = 807647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (807647) 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, 687 + ... + 1444.

It is an arithmetic number, because the mean of its divisors is an integer number (202540).

2⁸⁰⁷⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

807649 is a deficient number, since it is larger than the sum of its proper divisors (2511).

807649 is a wasteful number, since it uses less digits than its factorization.

807649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 807649 is about 898.6929397742. The cubic root of 807649 is about 93.1267013187.

The spelling of 807649 in words is "eight hundred seven thousand, six hundred forty-nine".