708477997 has 4 divisors (see below), whose sum is σ = 708544540. Its totient is φ = 708411456.

The previous prime is 708477989. The next prime is 708478031. The reversal of 708477997 is 799774807.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 799774807 = 13 ⋅61521139.

It can be written as a sum of positive squares in 2 ways, for example, as 12257001 + 696220996 = 3501^2 + 26386^2 .

It is a 3-Lehmer number, since φ(708477997) divides (708477997-1)³.

It is a cyclic number.

It is not a de Polignac number, because 708477997 - 2³ = 708477989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (708477097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13308 + ... + 39925.

It is an arithmetic number, because the mean of its divisors is an integer number (177136135).

Almost surely, 2^708477997 is an apocalyptic number.

708477997 is the 13309-th decagonal number.

It is an amenable number.

708477997 is a deficient number, since it is larger than the sum of its proper divisors (66543).

708477997 is a wasteful number, since it uses less digits than its factorization.

708477997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66542.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The square root of 708477997 is about 26617.2499894335. The cubic root of 708477997 is about 891.4742208528.

The spelling of 708477997 in words is "seven hundred eight million, four hundred seventy-seven thousand, nine hundred ninety-seven".