744143845 has 4 divisors (see below), whose sum is σ = 892972620. Its totient is φ = 595315072.

The previous prime is 744143843. The next prime is 744143957. The reversal of 744143845 is 548341447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267944161 + 476199684 = 16369^2 + 21822^2 .

It is a cyclic number.

It is not a de Polignac number, because 744143845 - 2¹ = 744143843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 744143798 and 744143807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744143843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74414380 + ... + 74414389.

It is an arithmetic number, because the mean of its divisors is an integer number (223243155).

Almost surely, 2^744143845 is an apocalyptic number.

It is an amenable number.

744143845 is a deficient number, since it is larger than the sum of its proper divisors (148828775).

744143845 is a wasteful number, since it uses less digits than its factorization.

744143845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148828774.

The product of its digits is 215040, while the sum is 40.

The square root of 744143845 is about 27279.0000733165. Note that the first 4 decimals coincide. The cubic root of 744143845 is about 906.1893725910.

The spelling of 744143845 in words is "seven hundred forty-four million, one hundred forty-three thousand, eight hundred forty-five".