861170061 has 4 divisors (see below), whose sum is σ = 1148226752. Its totient is φ = 574113372.

The previous prime is 861170059. The next prime is 861170131. The reversal of 861170061 is 160071168.

It is a happy number.

861170061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 861170061 - 2¹ = 861170059 is a prime.

It is a super-2 number, since 2×861170061² = 1483227747925487442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861170021) 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, 143528341 + ... + 143528346.

It is an arithmetic number, because the mean of its divisors is an integer number (287056688).

Almost surely, 2^861170061 is an apocalyptic number.

It is an amenable number.

861170061 is a deficient number, since it is larger than the sum of its proper divisors (287056691).

861170061 is a wasteful number, since it uses less digits than its factorization.

861170061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287056690.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 861170061 is about 29345.6991908525. The cubic root of 861170061 is about 951.3996215247.

The spelling of 861170061 in words is "eight hundred sixty-one million, one hundred seventy thousand, sixty-one".