708878721 has 4 divisors (see below), whose sum is σ = 945171632. Its totient is φ = 472585812.

The previous prime is 708878683. The next prime is 708878747. The reversal of 708878721 is 127878807.

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.

It is not a de Polignac number, because 708878721 - 2²² = 704684417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (708878221) 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, 118146451 + ... + 118146456.

It is an arithmetic number, because the mean of its divisors is an integer number (236292908).

Almost surely, 2^708878721 is an apocalyptic number.

It is an amenable number.

708878721 is a deficient number, since it is larger than the sum of its proper divisors (236292911).

708878721 is a wasteful number, since it uses less digits than its factorization.

708878721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236292910.

The product of its (nonzero) digits is 351232, while the sum is 48.

The square root of 708878721 is about 26624.7764497657. The cubic root of 708878721 is about 891.6422654904.

The spelling of 708878721 in words is "seven hundred eight million, eight hundred seventy-eight thousand, seven hundred twenty-one".