706305521 has 4 divisors (see below), whose sum is σ = 707574132. Its totient is φ = 705036912.

The previous prime is 706305517. The next prime is 706305529. The reversal of 706305521 is 125503607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85747600 + 620557921 = 9260^2 + 24911^2 .

It is a cyclic number.

It is not a de Polignac number, because 706305521 - 2² = 706305517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706305529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633470 + ... + 634583.

It is an arithmetic number, because the mean of its divisors is an integer number (176893533).

Almost surely, 2^706305521 is an apocalyptic number.

It is an amenable number.

706305521 is a deficient number, since it is larger than the sum of its proper divisors (1268611).

706305521 is a wasteful number, since it uses less digits than its factorization.

706305521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268610.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 706305521 is about 26576.4091065742. The cubic root of 706305521 is about 890.5620827633.

The spelling of 706305521 in words is "seven hundred six million, three hundred five thousand, five hundred twenty-one".