744118657 has 4 divisors (see below), whose sum is σ = 744174340. Its totient is φ = 744062976.

The previous prime is 744118633. The next prime is 744118691. The reversal of 744118657 is 756811447.

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 38738176 + 705380481 = 6224^2 + 26559^2 .

It is a 3-Lehmer number, since φ(744118657) divides (744118657-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744118657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744112657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5569 + ... + 38977.

It is an arithmetic number, because the mean of its divisors is an integer number (186043585).

Almost surely, 2^744118657 is an apocalyptic number.

744118657 is the 22273-rd pentagonal number.

It is an amenable number.

744118657 is a deficient number, since it is larger than the sum of its proper divisors (55683).

744118657 is a wasteful number, since it uses less digits than its factorization.

744118657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55682.

The product of its digits is 188160, while the sum is 43.

The square root of 744118657 is about 27278.5383955959. The cubic root of 744118657 is about 906.1791481541.

The spelling of 744118657 in words is "seven hundred forty-four million, one hundred eighteen thousand, six hundred fifty-seven".