744655 has 4 divisors (see below), whose sum is σ = 893592. Its totient is φ = 595720.

The previous prime is 744649. The next prime is 744659. The reversal of 744655 is 556447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556447 = 53 ⋅10499.

It is not a de Polignac number, because 744655 - 2¹¹ = 742607 is a prime.

It is a super-2 number, since 2×744655² = 1109022138050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744659) 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, 74461 + ... + 74470.

It is an arithmetic number, because the mean of its divisors is an integer number (223398).

2⁷⁴⁴⁶⁵⁵ is an apocalyptic number.

744655 is a deficient number, since it is larger than the sum of its proper divisors (148937).

744655 is a wasteful number, since it uses less digits than its factorization.

744655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148936.

The product of its digits is 16800, while the sum is 31.

The square root of 744655 is about 862.9339488049. The cubic root of 744655 is about 90.6396813314.

The spelling of 744655 in words is "seven hundred forty-four thousand, six hundred fifty-five".