407749 has 4 divisors (see below), whose sum is σ = 414720. Its totient is φ = 400780.

The previous prime is 407747. The next prime is 407783. The reversal of 407749 is 947704.

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.

It is a cyclic number.

It is not a de Polignac number, because 407749 - 2¹ = 407747 is a prime.

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.

407749 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 407749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407741) 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, 3397 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (103680).

2⁴⁰⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

407749 is a deficient number, since it is larger than the sum of its proper divisors (6971).

407749 is an equidigital number, since it uses as much as digits as its factorization.

407749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 407749 is about 638.5522688081. The cubic root of 407749 is about 74.1533828557.

It can be divided in two parts, 407 and 749, that added together give a square (1156 = 34²).

The spelling of 407749 in words is "four hundred seven thousand, seven hundred forty-nine".