708721439 has 2 divisors, whose sum is σ = 708721440. Its totient is φ = 708721438.

The previous prime is 708721427. The next prime is 708721457. The reversal of 708721439 is 934127807.

It is a weak prime.

It is an emirp because it is prime and its reverse (934127807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 708721439 - 2¹² = 708717343 is a prime.

It is a super-3 number, since 3×708721439³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 708721396 and 708721405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (708721469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354360719 + 354360720.

It is an arithmetic number, because the mean of its divisors is an integer number (354360720).

Almost surely, 2^708721439 is an apocalyptic number.

708721439 is a deficient number, since it is larger than the sum of its proper divisors (1).

708721439 is an equidigital number, since it uses as much as digits as its factorization.

708721439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 708721439 is about 26621.8226085293. The cubic root of 708721439 is about 891.5763164323.

The spelling of 708721439 in words is "seven hundred eight million, seven hundred twenty-one thousand, four hundred thirty-nine".