708751921 has 2 divisors, whose sum is σ = 708751922. Its totient is φ = 708751920.

The previous prime is 708751907. The next prime is 708751957. The reversal of 708751921 is 129157807.

708751921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699073600 + 9678321 = 26440^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 708751921 - 2²⁹ = 171881009 is a prime.

It is not a weakly prime, because it can be changed into another prime (708751721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354375960 + 354375961.

It is an arithmetic number, because the mean of its divisors is an integer number (354375961).

Almost surely, 2^708751921 is an apocalyptic number.

It is an amenable number.

708751921 is a deficient number, since it is larger than the sum of its proper divisors (1).

708751921 is an equidigital number, since it uses as much as digits as its factorization.

708751921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 708751921 is about 26622.3951026199. The cubic root of 708751921 is about 891.5890984357.

The spelling of 708751921 in words is "seven hundred eight million, seven hundred fifty-one thousand, nine hundred twenty-one".