747647 has 2 divisors, whose sum is σ = 747648. Its totient is φ = 747646.

The previous prime is 747619. The next prime is 747673. The reversal of 747647 is 746747.

It is a strong prime.

It is an emirp because it is prime and its reverse (746747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 747647 - 2⁶ = 747583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373823 + 373824.

It is an arithmetic number, because the mean of its divisors is an integer number (373824).

2⁷⁴⁷⁶⁴⁷ is an apocalyptic number.

747647 is a deficient number, since it is larger than the sum of its proper divisors (1).

747647 is an equidigital number, since it uses as much as digits as its factorization.

747647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 35.

The square root of 747647 is about 864.6658314054. The cubic root of 747647 is about 90.7609148865.

Subtracting from 747647 its reverse (746747), we obtain a square (900 = 30²).

The spelling of 747647 in words is "seven hundred forty-seven thousand, six hundred forty-seven".