706520109 has 4 divisors (see below), whose sum is σ = 942026816. Its totient is φ = 471013404.

The previous prime is 706520081. The next prime is 706520123. The reversal of 706520109 is 901025607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 706520109 - 2¹⁷ = 706389037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706520609) 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, 117753349 + ... + 117753354.

It is an arithmetic number, because the mean of its divisors is an integer number (235506704).

Almost surely, 2^706520109 is an apocalyptic number.

It is an amenable number.

706520109 is a deficient number, since it is larger than the sum of its proper divisors (235506707).

706520109 is a wasteful number, since it uses less digits than its factorization.

706520109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235506706.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 706520109 is about 26580.4459894863. The cubic root of 706520109 is about 890.6522630891.

The spelling of 706520109 in words is "seven hundred six million, five hundred twenty thousand, one hundred nine".