787849 has 4 divisors (see below), whose sum is σ = 790020. Its totient is φ = 785680.

The previous prime is 787837. The next prime is 787879. The reversal of 787849 is 948787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198025 + 589824 = 445^2 + 768^2 .

It is a cyclic number.

It is not a de Polignac number, because 787849 - 2⁵ = 787817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (197505).

2⁷⁸⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

787849 is a deficient number, since it is larger than the sum of its proper divisors (2171).

787849 is a wasteful number, since it uses less digits than its factorization.

787849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its digits is 112896, while the sum is 43.

The square root of 787849 is about 887.6085849067. The cubic root of 787849 is about 92.3593772695.

The spelling of 787849 in words is "seven hundred eighty-seven thousand, eight hundred forty-nine".