744779121 has 4 divisors (see below), whose sum is σ = 993038832. Its totient is φ = 496519412.

The previous prime is 744779117. The next prime is 744779159. The reversal of 744779121 is 121977447.

744779121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121977447 = 3 ⋅40659149.

It is a cyclic number.

It is not a de Polignac number, because 744779121 - 2² = 744779117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (744779621) 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, 124129851 + ... + 124129856.

It is an arithmetic number, because the mean of its divisors is an integer number (248259708).

Almost surely, 2^744779121 is an apocalyptic number.

It is an amenable number.

744779121 is a deficient number, since it is larger than the sum of its proper divisors (248259711).

744779121 is a wasteful number, since it uses less digits than its factorization.

744779121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248259710.

The product of its digits is 98784, while the sum is 42.

The square root of 744779121 is about 27290.6416377483. The cubic root of 744779121 is about 906.4471706954.

It can be divided in two parts, 7447 and 79121, that added together give a palindrome (86568).

The spelling of 744779121 in words is "seven hundred forty-four million, seven hundred seventy-nine thousand, one hundred twenty-one".