747345447 has 20 divisors (see below), whose sum is σ = 1118359440. Its totient is φ = 497358144.

The previous prime is 747345419. The next prime is 747345497. The reversal of 747345447 is 744543747.

747345447 is a `hidden beast` number, since 74 + 7 + 34 + 544 + 7 = 666.

747345447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 747345447 - 2⁸ = 747345191 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747345407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40254 + ... + 55812.

It is an arithmetic number, because the mean of its divisors is an integer number (55917972).

Almost surely, 2^747345447 is an apocalyptic number.

747345447 is a deficient number, since it is larger than the sum of its proper divisors (371013993).

747345447 is a wasteful number, since it uses less digits than its factorization.

747345447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16164 (or 16155 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 45.

The square root of 747345447 is about 27337.6196293679. The cubic root of 747345447 is about 907.4871086209.

The spelling of 747345447 in words is "seven hundred forty-seven million, three hundred forty-five thousand, four hundred forty-seven".