747144321 has 32 divisors (see below), whose sum is σ = 1250995200. Its totient is φ = 385318080.

The previous prime is 747144319. The next prime is 747144323. The reversal of 747144321 is 123441747.

It is an interprime number because it is at equal distance from previous prime (747144319) and next prime (747144323).

It is not a de Polignac number, because 747144321 - 2¹ = 747144319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (747144323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20475 + ... + 43743.

It is an arithmetic number, because the mean of its divisors is an integer number (39093600).

Almost surely, 2^747144321 is an apocalyptic number.

It is an amenable number.

747144321 is a deficient number, since it is larger than the sum of its proper divisors (503850879).

747144321 is a wasteful number, since it uses less digits than its factorization.

747144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23429.

The product of its digits is 18816, while the sum is 33.

The square root of 747144321 is about 27333.9408245500. The cubic root of 747144321 is about 907.4056935142.

The spelling of 747144321 in words is "seven hundred forty-seven million, one hundred forty-four thousand, three hundred twenty-one".