861073761 has 4 divisors (see below), whose sum is σ = 1148098352. Its totient is φ = 574049172.

The previous prime is 861073739. The next prime is 861073769. The reversal of 861073761 is 167370168.

861073761 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 861073761 - 2¹¹ = 861071713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (861073769) 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, 143512291 + ... + 143512296.

It is an arithmetic number, because the mean of its divisors is an integer number (287024588).

Almost surely, 2^861073761 is an apocalyptic number.

It is an amenable number.

861073761 is a deficient number, since it is larger than the sum of its proper divisors (287024591).

861073761 is a wasteful number, since it uses less digits than its factorization.

861073761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287024590.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 861073761 is about 29344.0583594022. The cubic root of 861073761 is about 951.3641569078.

The spelling of 861073761 in words is "eight hundred sixty-one million, seventy-three thousand, seven hundred sixty-one".