703921 has 3 divisors (see below), whose sum is σ = 704761. Its totient is φ = 703082.

The previous prime is 703907. The next prime is 703943. The reversal of 703921 is 129307.

The square root of 703921 is 839.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 129307 = 191 ⋅677.

It is not a de Polignac number, because 703921 - 2¹⁹ = 179633 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 703892 and 703901.

It is not an unprimeable number, because it can be changed into a prime (703981) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 420 + ... + 1258.

703921 is a Friedman number, since it can be written as (70*(9+3)-1)^2, using all its digits and the basic arithmetic operations.

2⁷⁰³⁹²¹ is an apocalyptic number.

703921 is the 839-th square number.

703921 is the 420-th centered octagonal number.

It is an amenable number.

703921 is a deficient number, since it is larger than the sum of its proper divisors (840).

703921 is an frugal number, since it uses more digits than its factorization.

703921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The cubic root of 703921 is about 88.9558759523.

The spelling of 703921 in words is "seven hundred three thousand, nine hundred twenty-one".