708538012009 has 9 divisors (see below), whose sum is σ = 710180690071. Its totient is φ = 706899130600.

The previous prime is 708538011959. The next prime is 708538012019. The reversal of 708538012009 is 900210835807.

The square root of 708538012009 is 841747.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1088802009 + 707449210000 = 32997^2 + 841100^2 .

It is not a de Polignac number, because 708538012009 - 2²³ = 708529623401 is a prime.

It is a super-2 number, since 2×708538012009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (708538012019) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 544609659 + ... + 544610959.

Almost surely, 2^708538012009 is an apocalyptic number.

708538012009 is the 841747-th square number.

708538012009 is the 420874-th centered octagonal number.

It is an amenable number.

708538012009 is a deficient number, since it is larger than the sum of its proper divisors (1642678062).

708538012009 is an frugal number, since it uses more digits than its factorization.

708538012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 708538012009 in words is "seven hundred eight billion, five hundred thirty-eight million, twelve thousand, nine".