703661 has 4 divisors (see below), whose sum is σ = 804192. Its totient is φ = 603132.

The previous prime is 703657. The next prime is 703663. The reversal of 703661 is 166307.

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: 166307 = 19 ⋅8753.

It is a cyclic number.

It is not a de Polignac number, because 703661 - 2² = 703657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (703663) 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, 50255 + ... + 50268.

It is an arithmetic number, because the mean of its divisors is an integer number (201048).

2⁷⁰³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

703661 is a deficient number, since it is larger than the sum of its proper divisors (100531).

703661 is a wasteful number, since it uses less digits than its factorization.

703661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100530.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 703661 is about 838.8450393249. The cubic root of 703661 is about 88.9449223671.

Adding to 703661 its reverse (166307), we get a palindrome (869968).

The spelling of 703661 in words is "seven hundred three thousand, six hundred sixty-one".