740209 has 4 divisors (see below), whose sum is σ = 772416. Its totient is φ = 708004.

The previous prime is 740191. The next prime is 740227. The reversal of 740209 is 902047.

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 an interprime number because it is at equal distance from previous prime (740191) and next prime (740227).

It is a cyclic number.

It is not a de Polignac number, because 740209 - 2¹⁹ = 215921 is a prime.

It is a Smith number, since the sum of its digits (22) 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 self number, because there is not a number n which added to its sum of digits gives 740209.

It is not an unprimeable number, because it can be changed into a prime (740279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16069 + ... + 16114.

It is an arithmetic number, because the mean of its divisors is an integer number (193104).

2⁷⁴⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

740209 is a deficient number, since it is larger than the sum of its proper divisors (32207).

740209 is a wasteful number, since it uses less digits than its factorization.

740209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32206.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 740209 is about 860.3539969106. The cubic root of 740209 is about 90.4589315406.

It can be divided in two parts, 740 and 209, that added together give a palindrome (949).

The spelling of 740209 in words is "seven hundred forty thousand, two hundred nine".