703668561 has 4 divisors (see below), whose sum is σ = 938224752. Its totient is φ = 469112372.

The previous prime is 703668541. The next prime is 703668599. The reversal of 703668561 is 165866307.

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: 165866307 = 3 ⋅55288769.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-703668561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (703668541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117278091 + ... + 117278096.

It is an arithmetic number, because the mean of its divisors is an integer number (234556188).

Almost surely, 2^703668561 is an apocalyptic number.

It is an amenable number.

703668561 is a deficient number, since it is larger than the sum of its proper divisors (234556191).

703668561 is a wasteful number, since it uses less digits than its factorization.

703668561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234556190.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 703668561 is about 26526.7517988916. The cubic root of 703668561 is about 889.4524094391.

The spelling of 703668561 in words is "seven hundred three million, six hundred sixty-eight thousand, five hundred sixty-one".