738649 has 4 divisors (see below), whose sum is σ = 750820. Its totient is φ = 726480.

The previous prime is 738643. The next prime is 738677. The reversal of 738649 is 946837.

738649 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 an emirpimes, since its reverse is a distinct semiprime: 946837 = 349 ⋅2713.

It can be written as a sum of positive squares in 2 ways, for example, as 416025 + 322624 = 645^2 + 568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (738643) 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, 5994 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (187705).

2⁷³⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

738649 is a deficient number, since it is larger than the sum of its proper divisors (12171).

738649 is a wasteful number, since it uses less digits than its factorization.

738649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12170.

The product of its digits is 36288, while the sum is 37.

The square root of 738649 is about 859.4469151728. The cubic root of 738649 is about 90.3953390580.

The spelling of 738649 in words is "seven hundred thirty-eight thousand, six hundred forty-nine".