703609 has 4 divisors (see below), whose sum is σ = 720016. Its totient is φ = 687204.

The previous prime is 703561. The next prime is 703631. The reversal of 703609 is 906307.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906307 = 487 ⋅1861.

It is a cyclic number.

It is not a de Polignac number, because 703609 - 2¹⁹ = 179321 is a prime.

It is a Duffinian number.

703609 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (703679) 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, 8139 + ... + 8224.

It is an arithmetic number, because the mean of its divisors is an integer number (180004).

2⁷⁰³⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

703609 is a deficient number, since it is larger than the sum of its proper divisors (16407).

703609 is a wasteful number, since it uses less digits than its factorization.

703609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16406.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 703609 is about 838.8140437546. The cubic root of 703609 is about 88.9427313263.

The spelling of 703609 in words is "seven hundred three thousand, six hundred nine".