861071013 has 64 divisors (see below), whose sum is σ = 1472486400. Its totient is φ = 491832000.

The previous prime is 861071011. The next prime is 861071017. The reversal of 861071013 is 310170168.

It is not a de Polignac number, because 861071013 - 2¹ = 861071011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861071011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1867603 + ... + 1868063.

It is an arithmetic number, because the mean of its divisors is an integer number (23007600).

Almost surely, 2^861071013 is an apocalyptic number.

It is an amenable number.

861071013 is a deficient number, since it is larger than the sum of its proper divisors (611415387).

861071013 is a wasteful number, since it uses less digits than its factorization.

861071013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 861071013 is about 29344.0115355757. The cubic root of 861071013 is about 951.3631448569.

The spelling of 861071013 in words is "eight hundred sixty-one million, seventy-one thousand, thirteen".