708049409 has 2 divisors, whose sum is σ = 708049410. Its totient is φ = 708049408.

The previous prime is 708049399. The next prime is 708049453. The reversal of 708049409 is 904940807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695482384 + 12567025 = 26372^2 + 3545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-708049409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (708049499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354024704 + 354024705.

It is an arithmetic number, because the mean of its divisors is an integer number (354024705).

Almost surely, 2^708049409 is an apocalyptic number.

It is an amenable number.

708049409 is a deficient number, since it is larger than the sum of its proper divisors (1).

708049409 is an equidigital number, since it uses as much as digits as its factorization.

708049409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 708049409 is about 26609.1978270672. The cubic root of 708049409 is about 891.2944212330.

The spelling of 708049409 in words is "seven hundred eight million, forty-nine thousand, four hundred nine".