847749 has 24 divisors (see below), whose sum is σ = 1349760. Its totient is φ = 471744.

The previous prime is 847741. The next prime is 847787. The reversal of 847749 is 947748.

It is not a de Polignac number, because 847749 - 2³ = 847741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10692 + ... + 10770.

It is an arithmetic number, because the mean of its divisors is an integer number (56240).

2⁸⁴⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

847749 is a deficient number, since it is larger than the sum of its proper divisors (502011).

847749 is a wasteful number, since it uses less digits than its factorization.

847749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 162 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 847749 is about 920.7328602803. The cubic root of 847749 is about 94.6431301557.

Subtracting 847749 from its reverse (947748), we obtain a palindrome (99999).

It can be divided in two parts, 847 and 749, that added together give a triangular number (1596 = T₅₆).

The spelling of 847749 in words is "eight hundred forty-seven thousand, seven hundred forty-nine".