744977741 has 4 divisors (see below), whose sum is σ = 745050684. Its totient is φ = 744904800.

The previous prime is 744977729. The next prime is 744977747. The reversal of 744977741 is 147779447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 390220516 + 354757225 = 19754^2 + 18835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744977741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 744977741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744977747) 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, 18050 + ... + 42611.

It is an arithmetic number, because the mean of its divisors is an integer number (186262671).

Almost surely, 2^744977741 is an apocalyptic number.

It is an amenable number.

744977741 is a deficient number, since it is larger than the sum of its proper divisors (72943).

744977741 is a wasteful number, since it uses less digits than its factorization.

744977741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72942.

The product of its digits is 1382976, while the sum is 50.

The square root of 744977741 is about 27294.2803715357. The cubic root of 744977741 is about 906.5277415788.

The spelling of 744977741 in words is "seven hundred forty-four million, nine hundred seventy-seven thousand, seven hundred forty-one".