747847 has 4 divisors (see below), whose sum is σ = 791856. Its totient is φ = 703840.

The previous prime is 747841. The next prime is 747853. The reversal of 747847 is 748747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748747 = 751 ⋅997.

It is an interprime number because it is at equal distance from previous prime (747841) and next prime (747853).

It is a cyclic number.

It is not a de Polignac number, because 747847 - 2³ = 747839 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21979 + ... + 22012.

It is an arithmetic number, because the mean of its divisors is an integer number (197964).

2⁷⁴⁷⁸⁴⁷ is an apocalyptic number.

747847 is a deficient number, since it is larger than the sum of its proper divisors (44009).

747847 is a wasteful number, since it uses less digits than its factorization.

747847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44008.

The product of its digits is 43904, while the sum is 37.

The square root of 747847 is about 864.7814752873. The cubic root of 747847 is about 90.7690071923.

Subtracting 747847 from its reverse (748747), we obtain a square (900 = 30²).

It can be divided in two parts, 74 and 7847, that added together give a square (7921 = 89²).

The spelling of 747847 in words is "seven hundred forty-seven thousand, eight hundred forty-seven".