861059079 has 36 divisors (see below), whose sum is σ = 1326802984. Its totient is φ = 558367344.

The previous prime is 861059077. The next prime is 861059099. The reversal of 861059079 is 970950168.

It is not a de Polignac number, because 861059079 - 2¹ = 861059077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861059071) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 240984 + ... + 244530.

Almost surely, 2^861059079 is an apocalyptic number.

861059079 is a deficient number, since it is larger than the sum of its proper divisors (465743905).

861059079 is an frugal number, since it uses more digits than its factorization.

861059079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608 (or 3587 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 861059079 is about 29343.8081884407. The cubic root of 861059079 is about 951.3587497024.

The spelling of 861059079 in words is "eight hundred sixty-one million, fifty-nine thousand, seventy-nine".