706122581 has 4 divisors (see below), whose sum is σ = 716661792. Its totient is φ = 695583372.

The previous prime is 706122559. The next prime is 706122589. The reversal of 706122581 is 185221607.

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 cyclic number.

It is not a de Polignac number, because 706122581 - 2¹⁴ = 706106197 is a prime.

It is a super-4 number, since 4×706122581⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706122589) 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, 5269505 + ... + 5269638.

It is an arithmetic number, because the mean of its divisors is an integer number (179165448).

Almost surely, 2^706122581 is an apocalyptic number.

It is an amenable number.

706122581 is a deficient number, since it is larger than the sum of its proper divisors (10539211).

706122581 is a wasteful number, since it uses less digits than its factorization.

706122581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539210.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 706122581 is about 26572.9671094517. The cubic root of 706122581 is about 890.4851880436.

The spelling of 706122581 in words is "seven hundred six million, one hundred twenty-two thousand, five hundred eighty-one".