708321 has 4 divisors (see below), whose sum is σ = 944432. Its totient is φ = 472212.

The previous prime is 708311. The next prime is 708329. The reversal of 708321 is 123807.

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: 123807 = 3 ⋅41269.

It is not a de Polignac number, because 708321 - 2¹³ = 700129 is a prime.

It is a D-number.

It is a Duffinian number.

708321 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 708321.

It is not an unprimeable number, because it can be changed into a prime (708329) 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, 118051 + ... + 118056.

It is an arithmetic number, because the mean of its divisors is an integer number (236108).

2⁷⁰⁸³²¹ is an apocalyptic number.

It is an amenable number.

708321 is a deficient number, since it is larger than the sum of its proper divisors (236111).

708321 is a wasteful number, since it uses less digits than its factorization.

708321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236110.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 708321 is about 841.6180844065. The cubic root of 708321 is about 89.1408366482.

The spelling of 708321 in words is "seven hundred eight thousand, three hundred twenty-one".