856061005 has 8 divisors (see below), whose sum is σ = 1062696600. Its totient is φ = 661233216.

The previous prime is 856060991. The next prime is 856061023. The reversal of 856061005 is 500160658.

It can be written as a sum of positive squares in 4 ways, for example, as 141086884 + 714974121 = 11878^2 + 26739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856061005 - 2⁵ = 856060973 is a prime.

It is a super-2 number, since 2×856061005² = 1465680888563220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2951790 + ... + 2952079.

It is an arithmetic number, because the mean of its divisors is an integer number (132837075).

Almost surely, 2^856061005 is an apocalyptic number.

It is an amenable number.

856061005 is a deficient number, since it is larger than the sum of its proper divisors (206635595).

856061005 is a wasteful number, since it uses less digits than its factorization.

856061005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903903.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 856061005 is about 29258.5202120681. The cubic root of 856061005 is about 949.5144351471.

The spelling of 856061005 in words is "eight hundred fifty-six million, sixty-one thousand, five".