706536561 has 4 divisors (see below), whose sum is σ = 942048752. Its totient is φ = 471024372.

The previous prime is 706536547. The next prime is 706536617. The reversal of 706536561 is 165635607.

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 a de Polignac number, because none of the positive numbers 2^k-706536561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (706536521) 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, 117756091 + ... + 117756096.

It is an arithmetic number, because the mean of its divisors is an integer number (235512188).

Almost surely, 2^706536561 is an apocalyptic number.

It is an amenable number.

706536561 is a deficient number, since it is larger than the sum of its proper divisors (235512191).

706536561 is a wasteful number, since it uses less digits than its factorization.

706536561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235512190.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 706536561 is about 26580.7554633047. The cubic root of 706536561 is about 890.6591762669.

The spelling of 706536561 in words is "seven hundred six million, five hundred thirty-six thousand, five hundred sixty-one".