708164021 has 8 divisors (see below), whose sum is σ = 742621080. Its totient is φ = 674376192.

The previous prime is 708163957. The next prime is 708164027. The reversal of 708164021 is 120461807.

It can be written as a sum of positive squares in 4 ways, for example, as 47416996 + 660747025 = 6886^2 + 25705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 708164021 - 2⁶ = 708163957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (708164027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165140 + ... + 169373.

It is an arithmetic number, because the mean of its divisors is an integer number (92827635).

Almost surely, 2^708164021 is an apocalyptic number.

It is an amenable number.

708164021 is a deficient number, since it is larger than the sum of its proper divisors (34457059).

708164021 is a wasteful number, since it uses less digits than its factorization.

708164021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334615.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 708164021 is about 26611.3513561412. The cubic root of 708164021 is about 891.3425099320.

The spelling of 708164021 in words is "seven hundred eight million, one hundred sixty-four thousand, twenty-one".