747646847 has 4 divisors (see below), whose sum is σ = 748067016. Its totient is φ = 747226680.

The previous prime is 747646843. The next prime is 747646853. The reversal of 747646847 is 748646747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748646747 = 4457 ⋅167971.

It is a cyclic number.

It is not a de Polignac number, because 747646847 - 2² = 747646843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747646843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207404 + ... + 210977.

It is an arithmetic number, because the mean of its divisors is an integer number (187016754).

Almost surely, 2^747646847 is an apocalyptic number.

747646847 is a deficient number, since it is larger than the sum of its proper divisors (420169).

747646847 is a wasteful number, since it uses less digits than its factorization.

747646847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420168.

The product of its digits is 6322176, while the sum is 53.

The square root of 747646847 is about 27343.1316238649. The cubic root of 747646847 is about 907.6090869531.

The spelling of 747646847 in words is "seven hundred forty-seven million, six hundred forty-six thousand, eight hundred forty-seven".